| "Home and Away" : The Cross-Fertilisation between 'Colonial' and 'British' Policing, 1921-85 | Sinclair, GeorginaWilliams, Chris A. | Article in Journal | | 2007 |
| "I hope to write as bad as ever" :
Swift's journal to Stella and the Intimacy of correspondence | Williams, Abigail | Article in Journal | | 2011 |
| "Miracle on the Shankill" : the Peace March and Rally of 28 August 1976 | Fraser, GraceMorgan, Valerie | Article in Book | Macmillan | 2000 |
| "No place is home - it is as it should be": exile in the writing of Maeve Brennan | McWilliams, Ellen | Article in Journal | | 2014 |
| "One dead horse, 10.30am" : Irish broadcasting 1926-1966 and the Easter Rebellion | Lynch, Brian | Article in Book | Routledge | 2007 |
| "Rint" and "Repale" : Punch and the image of Daniel O'Connell, 1842-1847 | Williams, Leslie | Article in Journal | | 1997 |
| "She was usually placed with the great men and leaders of the land in the public assemblies" - Alice Kyteler : a woman of considerable power | Williams, Bernadette | Article in Book | Four Courts Press | 2000 |
| "The atmospheric railway", with excerpts from "Our iron roads" by Frederick S. Williams, 1852 | Belton, G. N. | Article in Journal | | 1999 |
| "Too peculiarly Anglican" : the role of the established church in Ireland as a negative model in the development of the Church Missionary Society's commitment to independent native churches, 1856-1872 | Williams, C. Peter | Article in Book | Blackwell Publishers | 1989 |
| 'Aighneas an Choirp leis an Anam', An Leagan is Luaithe sa Bhreatnais | Caerwyn Williams, J. E. | Article in Book | Clóchomher Tta | 1997 |
| 'Almost frantic with joy' : the Nicholson revival and the Belfast troubles, 1922-23 | Wilson, Timothy | Article in Book | Cambridge Scholars | 2010 |
| 'Decorus and creditable' : the Irish in Newport | Williams, Chris | Article in Book | Liverpool University Press | 2004 |
| 'Due North' speaks to the archaeologist Brian Williams | | Article in Journal | | 2003 |
| 'Facing the sun' | Cooney, GabrielO'Sullivan, MuirisPrendergast, FrankWilliams, Ken | Article in Journal | | 2017 |
| 'Lacking Ware, withal' : finding Sir James Ware among the many incarnations of his histories | Williams, Mark | Article in Book | | 2014 |
| 'Making dead men speak': manipulating the memory of James Ussher | Ford, Alan, 1956- | Article in Book | | 2010 |
| 'Scum of the earth and refuse of mankind' : the negative reputation of Irish presbyterians on the colonial American frontier | Bankhurst, Benjamin | Article in Book | | 2010 |
| 'That rather bathetic Irish variety of parlour song' : James Joyce and modernist elementary music | Niven, Alex | Article in Book | | 2010 |
| 'The curlew' and the Abbey : Peter Warlock and W. B. Yeats | Paterson, Adrian | Article in Book | | 2010 |
| 'The King's Irishmen' : the roles, impact and experiences of the Irish in the exiled court of Charles II, 1649-1660 | Williams, Mark | Thesis | | |
| 'Twas only an Irishman's dream : the image of Ireland and the Irish in American popular song lyrics, 1800-1920 | Williams, William Henry Allen | Monograph or Collective Volume | University of Illinois Press | 1996 |
| A bibliography of the works of Johannes Scottus Eriugena | Sheldon-Williams, I. P. | Article in Journal | | 1960 |
| A Cambro-Hibernian alliance : Maria Jane Williams and Thomas Crofton Croker | Owen, Morfydd E. | Article in Journal | | 1996 |
| A Caroline trio : Ussher, Laud, and Williams | Knox, R. B. | Article in Journal | | 1963 |
| A catalogue of hoards and single finds from the British Isles c. AD 410-675 | Abdy, RichardWilliams, Gareth | Article in Book | | 2006 |
| A companion guide to architecture in Ireland, 1837-1921 | Girouard, MarkWilliams, Jeremy | Monograph or Collective Volume | Irish Academic Press | 1994 |
| A directory of rare book and special collections in the United Kingdom and the Republic of Ireland | | Monograph or Collective Volume | Library Association | 1985 |
| A firm of Dublin cabinet-makers, Mack, Williams & Gibton | Alexander, Angela | Article in Journal | | 1995 |
| A history of Williamstown, Kells | McNiffe, Liam | Monograph or Collective Volume | The author | 2003 |
| A late medieval rural settlement at Craigs, County Antrim | Williams, B. B. | Article in Journal | | 1988 |
| A list of the works doubtfully or wrongly attributed to Johannes Scottus Eriugena | Sheldon-Williams, I. P. | Article in Journal | | 1964 |
| A modern master | Ferran, Denise | Article in Journal | | 2008 |
| A musicscape from the early nineteenth century | Williams, Fionnuala Carson | Article in Book | | 2019 |
| A note on John K'Eogh's 'Herbal' | Williams, N. J. A. | Article in Journal | | 1987 |
| A note on Scáthan Shacramuinte na hAithridhe | Williams, N. J. A. | Article in Journal | | 1979 |
| A painter on Achill | Ledbetter, Gordon | Article in Journal | | 2006 |
| A place apart? : Ulster, Britain and devolution, 1886-1939 | Boyce, David George, 1942- | Article in Book | | 2006 |
| A random life of David Williamson | Maguire, W. A. (William Alexander) | Article in Journal | | 1991 |
| A ringfort and nearby area of prehistoric activity, Williamstown, Co Waterford: report on an archaeological excavation undertaken prior to the construction of the R710 Waterford Outer Relief Road. | Gleeson, CaitríonaGrogan, E.Lyons, S.McCutcheon, H.Roche, H. | Article in Journal | | 2010 |
| A seal of an Irish regiment in the service of the King of France | Williams, N. J. A. | Article in Journal | | 1992 |
| A short book list on Irish, Scottish and Welsh history | Dickinson, W. C.Maxwell, C.Williams, D. | Monograph or Collective Volume | Historical Association | 1952 |
| A stone in time : saving lost medieval memories of Irish stone monuments | Ní Ghrádaigh, Jenifer | Article in Book | | 2015 |
| A third reformation? 'Persecution and oppression' in seventeenth-century Kilkenny | Boran, Elizabethanne | Article in Journal | | 2007 |
| A treatise on military finance; containing the pay, subsistence, deductions, and arrears of the forces on the British and Irish establishments ... with an enquiry into the method of cloathing and recruiting the army | [Williamson, John] | Monograph or Collective Volume | | 1782 |
| A wooden figure found at Lettershendony, County Londonderry | Williams, B. B. | Article in Journal | | 1993 |
| Adjacent saints' dedications and early Celtic history | Jankulak, Karen | Article in Book | | 2009 |
| Aerial photography and inter-tidal archaeology in Northern Ireland | Williams, Brian | Article in Journal | | 1999 |
| After the famine : emigration from Ireland, 1850-1913 | Hatton, Timothy J.Williamson, Jeffrey G. | Article in Journal | | 1993 |
| Against insurrection : Eimar O'Duffy and the memory of the 1916 rising | Flanagan, Frank | Article in Book | | 2010 |
| Agriculture | Green, E. R. R. | Article in Book | | 1956 |
| Alarms and excursions in Lisbon under Castilian domination : the case of Captain Richard Butler | Williams, Michael E. | Article in Journal | | 1990 |
| Alexander Williams (1846-1930) : sidelights on a Victorian painter | Ledbetter, Gordon T. | Article in Journal | | 1975 |
| Alexander Williams on Achill. Mayo's most westerly garden was created a century ago... | Ledbetter, Gordon | Article in Journal | | 2011 |
| American presidents of Irish descent | Williamson, David | Article in Book | | 1993 |
| Americana in British books, 1621-1760 | Simmons, Richard C. | Article in Book | | 1995 |
| An authentic history of the professors of painting ... in Ireland | Pasquin, Anthony [i.e. Williams, John] | Monograph or Collective Volume | | 1796 |
| An authentic history of the professors of painting, sculpture, and architecture who have practised in Ireland | Williams, John | Monograph or Collective Volume | [s.n.] | 1769 |
| An cultúr, an polaitíocht agus an fhéiniúlacht in Éirinn sa séú haois déag: fianaise Thaidhg Dhaill Uí Uiginn (c.1550-1591) | Caball, Marc | Article in Book | | 2012 |
| An Echo of an Anonymous Royalist Broadside Poem of 1643 in Marvell's "An Horatian Ode upon Cromwell's Return from Ireland" | McWilliams, John | Article in Journal | | 2005 |
| An eighteenth/nineteenth century watermill complex near Ballyfeard, Co. Cork | Williams, William J. | Article in Journal | | 2003 |
| An fhoclóireacht Nua-Ghaeilge agus feidhm Edmund Fournier into in aimsir na hAthbheochana | Mac Amhlaigh, Liam | Article in Book | | 2012 |
| An Irish genius : J.H. de W. Waller 1884-1968 | Williams, Jeremy | Article in Journal | | 1996 |
| An Mhanainnis | Williams, Nicholas | Article in Book | Roinn na Sean-Gaeilge, Coláiste Phádraig, Maigh Nuad | 1994 |
| An Mheán-Ghaeilge | Breatnach, Liam | Article in Book | Roinn na Sean-Gaeilge, Coláiste Phádraig, Maigh Nuad | 1994 |
| An Nua-Ghaeilge Chlasaiceach | McManus, Damian | Article in Book | Roinn na Sean-Gaeilge, Coláiste Phádraig, Maigh Nuad | 1994 |
| An tSean-Ghaeilge agus a Réamhstair | McCone, Kim | Article in Book | Roinn na Sean-Gaeilge, Coláiste Phádraig, Maigh Nuad | 1994 |
| An unknown miniature of Mrs Jordan | Williamson, Usher A. F. | Article in Journal | | 1970 |
| Ancient mythology and revolutionary ideology in Ireland, 1878-1916 | Williams, M. | Article in Journal | | 1983 |
| Anglo-Irish relations in the early troubles, 1969-1972 | Williamson, Daniel C. | Monograph or Collective Volume | Bloomsbury | 2017 |
| Annales Cambriæ : chronicles and memorials of Great Britain and Ireland during the middle ages | | Monograph or Collective Volume | | 1860 |
| Another lost cause? Pan-Celticism, race and language | Williams, Daniel G. | Article in Journal | | 2009 |
| Another lost cause? Pan-Celticism, race and language | Williams, Daniel G. | Article in Journal | | 2009 |
| Anthracite development and railway progress | Williams, William Henry | Article in Journal | | 1922 |
| Antrim Bell-shrine | Williams, Brian | Article in Journal | | 2003 |
| Appendix 2 : Report on the dominant rock types from fulachtaí fia on Clare Island | Williams, D. Michael | Article in Book | | 2007 |
| Archaeological objects from County Fermanagh | Gormley, SarahWilliams, Brian, | Monograph or Collective Volume | Blackstaff Press / Environment and Heritage Service | 2002 |
| Architecture in Ireland, 1837-1971 : companion guide | Williams, Jeremy | Monograph or Collective Volume | Irish Academic Press | 1994 |
| Archives and archaeology : the Ulster plantations in the landscape | Brannon, N. F. (Nick) | Article in Book | | 1999 |
| Armagh city | McWilliams, Shirley M. | Article in Journal | | 1982 |
| Armagh district lunatic asylum : the first phase | Williamson, Arthur P. | Article in Journal | | 1976 |
| Armas : Sracfhéachaint ar Araltas na hÉireann | Williams, Nicholas | Monograph or Collective Volume | Coiscéim | 2001 |
| Arming the men : Ulster unionist masculinities and the Home Rule crisis | McGaughey, Jane | Article in Book | | 2010 |
| Articles on Eriugena | Sheldon-Williams, I. P. | Article in Book | | 1967 |
| Aspects of the continental education of Irish students in the reign of Elizabeth I | Hammerstein, Helga | Article in Book | | 1971 |
| Assembling the dead | Williams, Howard, 1972- | Article in Book | | 2004 |
| Avenging ‘Bridget’ : Irish domestic servants and middle-class America in the short stories of Maeve Brennan | McWilliams, Ellen | Article in Journal | | 2013 |
| Bad press : Thomas Campbell Foster and British reportage on the Irish famine, 1845-1849 | Williams, Leslie | Article in Book | | 2000 |
| Badfellas | Williams, Paul | Monograph or Collective Volume | Penguin Ireland | 2011 |
| Ballads and poems of the County Kildare | Williams, R. D. | Article in Journal | | 1908 |
| Ballinagare Castle, Co. Roscommon | O'Conor, KieranWilliams, Jeremy | Article in Book | | 2015 |
| Banking in county Donegal | Williams, J. D. | Article in Journal | | 1985 |
| Bardic poems of apology and reconciliation | Simms, Katharine | Article in Book | | 2012 |
| Bás agus athbheochan na Coirnise | Williams, Nicholas | Article in Journal | | 2001 |
| Bealtaine and Imbolg (Oimelc) in Cormac's Glossary | Williams, Éimear | Article in Journal | | 2005 |
| Befuddled in three languages : the readers of the 'Purgatorium Hibernicum' c. 1670 | Carpenter, Andrew | Article in Book | | 2012 |
| Bell, bank and souterrain: excavations at Drumadoon, County Antrim | McSparron, Cormac,Williams, Brian | Article in Book | | 2010 |
| Benjamin Woodward | O'Dwyer, FrederickWilliams, J. | Article in Book | | 1980 |
| Bernard Shaw : man and writer | Williamson, Audrey | Monograph or Collective Volume | Crowell-Collier Press | 1963 |
| Bibliographical note on medieval Anglo-Irish history | Gwynn, Aubrey | Article in Book | | 1958 |
| Bird life in Dublin Bay. The Passing of Clontarf Island | Williams, Alexander, R.H.A. | Article in Journal | | 1908 |
| Book clubs and printing societies of Great Britain and Ireland | Williams, Harold | Monograph or Collective Volume | | 1929 |
| Breaking up Britain : four nations after a union | | Monograph or Collective Volume | Lawrence & Wishart | 2009 |
| Bright star of the west : Joe Heaney, Irish song man | Williams, SeanÓ Laoire, Lillis | Monograph or Collective Volume | Oxford UP | 2011 |
| Bronze age burials at Kilcroagh, county Antrim and faience beads in Ireland | Williams, B. B. | Article in Journal | | 1991 |
| Bronze-and iron-age Celtic-speakers : what don't we know, what can't we know, and what could we know? language, genetics and archaeology in the twenty-first century | Sims-Williams, Patrick | Monograph or Collective Volume | | 2012 |
| Buchedd Beuno: The Middle Welsh Life of St Beuno | | Monograph or Collective Volume | Dublin Institute of Advanced Studies | 2018 |
| Candle beams : Cloughjordan priests, religious and lay missionaries | | Monograph or Collective Volume | Cloughjordan Heritage Group | 2003 |
| Cartography and utilitarianism versus culture : Thomas Colby and the Ordnance Survey of Ireland | McWilliams, Patrick | Article in Journal | | 2008 |
| Catalogue of seals in the National Museum of Wales, II : ecclesiastical, monastic and collegiate seals with a supplement concerning Wales | Williams, David H. (David Henry), 1933- | Monograph or Collective Volume | National Museums & Galleries of Wales | 1998 |
| Catherine McWilliams : a retrospective 1961-2004 | McWilliams, Catherine | Monograph or Collective Volume | Catherine McWilliams | 2004 |
| Catholic tastes and times : essays in honour of Michael E. Williams | | Monograph or Collective Volume | Trinity and All Saints College | 1987 |
| Cattleman | Keogh, Raymond
| Monograph or Collective Volume | Somerville | 2012 |
| Celestial portents and astrology in medieval Wales and Ireland | Williams, Mark | Thesis | | |
| Celtic civilization : continuity or coincidence? | Sims-Williams, Patrick | Article in Journal | | 2012 |
| Celtomania and celtoscepticism | Sims-Williams, Patrick | Article in Journal | | 1998 |
| Ceol na hÉireann agus amhráin na ndaoine sna Stáit Aontaithe | Williams, W. H. | Article in Book | | 1979 |
| Changing family names in Williamstown parish in north-east county Galway | Mulryan-Moloney, Maeve | Article in Journal | | 2004 |
| Charles Wye Williams and Irish steam shipping 1820-1850 | Harcourt, Freda | Article in Journal | | 1992 |
| Cheltenham festival centenary 1911-2011 : an Irish tribute | Williams, Guy St. John | Monograph or Collective Volume | Daletta Press | 2011 |
| Chester Beatty library | Williams, Brian | Article in Journal | | 1991 |
| Chronicque de la traison et mort de Richart Deux, roi Dengleterre | | Monograph or Collective Volume | English Historical Society | 1846 |
| Church and state in modern Ireland | Edwards, R. W. D. (Robert Walter Dudley) | Article in Book | | 1969 |
| Clough Williams-Ellis : Errant in Northern Ireland | Lappin, Sarah A. | Article in Journal | | 2021 |
| Clough Williams-Ellis : errant in Northern Ireland | Lappin, Sarah A. | Article in Journal | | 2021 |
| Collective identity and memory in Melbourne's St Patrick's Day celebrations, 1900-1939 | Williams, Caroline M. | Article in Book | | 2000 |
| Concerning Hugh Peters in Ireland : Carlyle and some historians | Williams, Joseph Batterson [i.e. Muddiman, Joseph George] | Article in Journal | | 1911 |
| Conclusion | Williams, T. Desmond | Article in Book | | 1967 |
| Conclusion | Williams, T. Desmond | Article in Book | | 1969 |
| Conclusion | Nowlan, Kevin B. | Article in Book | | 1973 |
| Conflict, power and patronage in Kilkenny and Tipperary, c.1300-c.1350 | Williams, Bernadette | Article in Journal | | 2019 |
| Constructing counter-revolutionary history in late eighteenth-century Ireland | Gillen, Ultán | Article in Book | | 2010 |
| Constructing the market cross at Tuam : the role of cultural patriotism in the study of Irish high crosses | Williams, Margaret Harcourt | Article in Book | | 2001 |
| Constructing the past : writing Irish history 1600-1800 | | Monograph or Collective Volume | Boydell | 2010 |
| Contemporary women playwrights | | Article in Book | | 2002 |
| Correspondence | Williams, Mrs M.L. | Article in Journal | | 1994 |
| Counties of south Ulster, 1834-38 : Cavan, Leitrim, Louth, Monaghan and Sligo | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1998 |
| County Fermanagh | McWilliams, Shirley M. | Article in Journal | | 1982 |
| Creating Irish tourism : the first century, 1750-1850 | Williams, William H. A. | Monograph or Collective Volume | Anthem | 2010 |
| Crime lords | Williams, Paul | Monograph or Collective Volume | Merlin | 2003 |
| Cromwell and Catholics : towards a reassessment of lay Catholic experience in Interregnum Ireland | Spurlock, R. Scott | Article in Book | | 2010 |
| Cromwell at Drogheda : a reply to Mr. J.B. Williams | Murray, R. H. | Article in Journal | | 1912 |
| Cromwell's massacre at Wexford | Williams, Joseph Batterson [i.e. Muddiman, Joseph George] | Article in Journal | | 1913 |
| Cronica Walliae | Llwyd, Humphrey | Monograph or Collective Volume | Gwasg Prifysgol Cymru / University of Wales Press | 2016 |
| Cú Chulainn in Wales : Welsh sources for Irish onomastics | Sims-Williams, Patrick | Article in Journal | | 1990 |
| Cywydd Iolo Goch i Rosier Mortimer : cefndir a chyd-destun | Williams, Gruffydd Aled | Article in Journal | | 1999 |
| Dáil Éireann and the army : unity and division (1919-1921) | Nowlan, Kevin B. | Article in Book | | 1968 |
| Daniel O'Connell, the British press and the Irish famine : killing remarks | Williams, Leslie A.Williams, William Henry Allen | Monograph or Collective Volume | Ashgate | 2003 |
| Dánta Mhuiris Mhic Dháibhí Dhuibh Mhic Gearailt. (Leabhar thaighde, 30ú himleabhar) | | Monograph or Collective Volume | | 1979 |
| De Valera in power | Williams, T. Desmond | Article in Book | | 1967 |
| Dean Swift, Hawkesworth, and 'the journal to Stella' | Williams, Harold | Article in Book | | 1945 |
| Death and memory in early medieval Britain | Williams, Howard, 1972- | Monograph or Collective Volume | Cambridge University Press | 2006 |
| Dermot O'Connor's blazons and Irish heraldic terminology | Williams, N. J. A. | Article in Journal | | 1990 |
| Dernaflaw School celebrates its 40th Anniversary | McWilliams, John J. | Article in Journal | | 2016 |
| Dernaflaw School celebrates its 40th Anniversary | McWilliams, John J. | Article in Journal | | 2016 |
| Devolution, federalism and imperial circuitry : Ireland, South Africa and India | Kelly, MatthewMcConnel, James | Article in Book | | 2006 |
| Dictionary of national biography | | Monograph or Collective Volume | | 1885 |
| Differences in Irish Urban and Rural Suicide Rates,
1976–1994 | Kelleher, Michael J.
Corcoran, Paul
Keeley, Helen S.
Chambers, Derek
Williamson, Eileen
McAuliffe, Carmel
Burke, Ursula
Byrne, Sinéad | Article in Journal | | 2002 |
| Donegal County Council : seventy five years | Williams, J. D. | Monograph or Collective Volume | Donegal County Council | 1974 |
| Dressing the Part : Depictions of Noble Costume in Irish High Crosses | Williams, Maggie McEnchroe | Article in Book | | 2002 |
| Dublin castle and the Royal Irish Constabulary (1916-1922) | Hawkins, Richard | Article in Book | | 1968 |
| Early Christian landscapes in County Antrim | Williams, B. B. | Article in Book | | 1983 |
| Early medieval settlement in North County Antrim: the significance of Doonmore and Drumadoon | McSparron, CormacWilliams, Brian | Article in Journal | | 2011 |
| Early medieval stone monuments : materiality, biography, landscape | | Monograph or Collective Volume | Boydell Press | 2015 |
| Early nineteenth century gunpowder magazines on Rocky Island, Co. Cork | Williams, William J. | Article in Journal | | 2002 |
| Echoes of the Neolithic at Irish stone circles. The discovery of megalithic art at Grange Stone Circle,Co Limerick | Williams, Ken | Article in Journal | | 2023 |
| Economic convergence : placing post-famine Ireland in comparative perspective | Williamson, Jeffrey G. | Article in Journal | | 1994 |
| Economy and Society in Ireland | Kinealy, Christine | Article in Book | | 2004 |
| Education and language | Ó Cuív, Brian | Article in Book | | 1968 |
| Education and language, 1938-51 | McCartney, Donal | Article in Book | | 1969 |
| Edward Roche of Garrylough, his ancestors, his descendents and his neglected address 'to the people of Ireland' | Williams, Tom | Article in Journal | | 1998 |
| Edward Williams. Born 8th May, 1848. Died 15th December, 1905. | Barrington, Richard M.
| Article in Journal | | 1906 |
| England, Ireland and Iberia in Olyuer of Castylle : the view from Burgundy | Williams, Elizabeth | Article in Book | | 2008 |
| English Monks and Irish Reform in the Eleventh and Twelfth centuries | Bethell, Denis L. T. | Article in Book | | 1971 |
| Enterprise, industrial development and social planning : Quakers and the emergence of the textile industry in Ireland | Williamson, Arthur P. | Article in Journal | | 1993 |
| Enterprise, industrial development and social planning : Quakers and the emergence of the textile industry in Ireland | Williamson, Arthur P. | Article in Journal | | 1992 |
| Eoin MacNeill and the Irish Volunteers | Williams, T. Desmond | Article in Book | | 1967 |
| Epistolary forms : published correspondence, letter journals and books | Williams, Abagail | Article in Book | | 2013 |
| Erskine Childers, 1870-1922 : a sketch | Williams, Arthur Frederic Basil, 1867-1950 | Monograph or Collective Volume | | 1926 |
| Evidence of environmental change since the earliest medieval period from the inter-tidal zone of Galway Bay | Mercer, BrianO'Carra, BrianWilliams, D. MichaelWood, Bill | Article in Journal | | 2014 |
| Evil empire : John Gilligan, his gang and the execution of journalist Veronica Guerin | Williams, Paul | Monograph or Collective Volume | [s.n.] | 2001 |
| Excavation of a tree-ring at Gallanagh, county Tyrone, and some observations on tree-rings | Williams, B. B. | Article in Journal | | 1981 |
| Executed : Tom Williams and the IRA | McVeigh, Jim | Monograph or Collective Volume | Beyond the Pale | 1999 |
| Failed founding fathers and abandoned sources: Edward Williams, Thomas Stephens and the young J.E. Lloyd | Löffler, Marion | Article in Book | | 2013 |
| Faith and the nation education and religious identity in the Republic of Ireland | Williams, Kevin | Article in Journal | | 1999 |
| Faith and the nation : education and religious identity in the Republic of Ireland | Williams, Kevin | Article in Journal | | 1999 |
| Faith and the nation : religion, culture and schooling in Ireland | Williams, Kevin | Monograph or Collective Volume | Dominican Publications | 2005 |
| Falling blossom : a British officer's enduring love for a Japanese woman | Pagnamenta, PeterWilliams, Momoko | Monograph or Collective Volume | Century | 2006 |
| Famine, illegitimacy, and the workhouse in western Ireland : Kilrush county Clare | Gray, PaulKennedy, Liam, 1946- | Article in Book | | 2005 |
| Famine, illegitimacy, and the workhouse in western Ireland : Kilrush, County Clare | Gary, PaulKennedy, Liam, 1946- | Article in Book | | 2005 |
| Fear an leabhair : Pádraig Ó Fiannachta | Ó Héalaí, Pádraig | Article in Book | Roinn na Sean-Gaeilge, Coláiste Phádraig, Maigh Nuad | 1994 |
| Fiery shapes : celestial portents and astrology in Ireland and Wales, 700-1700 | Williams, Mark | Monograph or Collective Volume | Oxford University Press | 2010 |
| For the love of my mother : a memoir | Rodgers, J. P. (John Paschal) | Monograph or Collective Volume | Mac Ruairi Art | 2005 |
| Foras na Gaeilge and Bwrdd yr Iaith Gymraeg : yoked but not yet shackled | Williams, Colin H. | Article in Journal | | 2009 |
| Foras na Gaeilge and Bwrdd yr Iaith Gymraeg : yoked but not yet shackled | Williams, Colin H. | Article in Journal | | 2009 |
| Fortification of Belfast | Muller, GeraldWilliamson, Gavin | Article in Journal | | 1995 |
| Fr. Patrick Walsh - the republican priest | Williams, Tom | Article in Journal | | 2001 |
| Fresh light on Cromwell at Drogheda | Williams, Joseph Batterson [i.e. Muddiman, Joseph George] | Article in Journal | | 1912 |
| From lost land to Emerald Isle : Ireland and the Irish in American sheet music, 1800-1920 | Williams, William Henry Allen | Article in Journal | | 1991 |
| From Scallet Hill to Brickfield town | O'Rorke, Kevin P. | Article in Journal | | 1985 |
| From the treaty to the civil war | Williams, Desmond T. | Article in Book | | 1968 |
| Gaeilge Chonnacht | Ó hUiginn, Ruairí | Article in Book | Roinn na Sean-Gaeilge, Coláiste Phádraig, Maigh Nuad: | 1994 |
| Gaeilge na hAlban | Watson, Seosamh | Article in Book | Roinn na Sean-Gaeilge, Coláiste Phádraig, Maigh Nuad | 1994 |
| Gaeilge na hIarmhí | Williams, Nicholas | Article in Book | | 2012 |
| Gaeilge na Mumhan | Ua Súilleabháin, Seán | Article in Book | Roinn na Sean-Gaeilge, Coláiste Phádraig, Maigh Nuad | 1994 |
| Gaeilge Uladh | Hughes, Arthur | Article in Book | Roinn na Sean-Gaeilge, Coláiste Phádraig, Maigh Nuad | 1994 |
| Gaelic Ireland and the Renaissance | Mac Craith, Mícheál | Article in Book | | 1990 |
| Gaelic texts and English script | Williams, N. J. A. | Article in Book | | 2010 |
| Genealogies in the Lowry family Bible | Williams, Margaret | Article in Journal | | 1982 |
| Geoffrey Leader-Williams 9th October 1911-9th December 2011 | French, Valerie | Article in Journal | | 2012 |
| Gildas, Maelgwn and the bards | Williams, John Ellis Caerwyn, 1912-1999 | Article in Book | NA | 1984 |
| Government versus secret societies : the Parnell era | Hawkins, Richard | Article in Book | | 1973 |
| Great Britain and the commonwealth | Williamson, James A. | Monograph or Collective Volume | Black | 1965 |
| Green again : Irish-American lace-curtain satire | Williams, William Henry Allen | Article in Journal | | 2002 |
| Griffith Williams, bishop of Ossory (1641-72) | Bolton, G. | Article in Journal | | 1984 |
| Griffith Williams, Bishop of Ossory, 1641-72 | Bolton, F.R. | Article in Journal | | 1984 |
| Haunting the graveyard : the secrets of a County Antrim friary | Forrest, Stephen | Article in Book | | 2010 |
| Helen Dick Megaw 1907–2002 | Glazer, A. MichaelKelsey, Christine | Article in Book | | 2006 |
| Henrici Quinti Angliae regis gesta... ab anno mccccxiv ad mccccxxii | | Monograph or Collective Volume | English Historical Society | 1964 |
| Henry McCullough and his Irish settlement | Williams, V. Faison | Article in Journal | | 1923 |
| Heresy in Ireland in the thirteenth and fourteenth centuries | Williams, Bernadette | Article in Book | | 2013 |
| Hierarchical structures and social value : the creation of Black and Irish identities in the United States | Williams, Richard E., 1947- | Monograph or Collective Volume | Cambridge University Press | 1990 |
| Historical studies, I | | Monograph or Collective Volume | Bowes & Bowes | 1958 |
| Historical studies, VIII | | Monograph or Collective Volume | Gill and Macmillan | 1971 |
| History of the Irish Derby | Hyland, Francis P. M.Williams, G. St. J. | Monograph or Collective Volume | Allen | 1980 |
| History of the name Murphy | Williams, James | Monograph or Collective Volume | Mercier Press | 1977 |
| History of the name O'Brien | Williams, James | Monograph or Collective Volume | Mercier Press | 1978 |
| History of the name O'Kelly | Williams, James | Monograph or Collective Volume | Mercier Press | 1978 |
| History, the Interregnum and the exiled Irish | Williams, Mark | Article in Book | | 2010 |
| Home rule problems | | Monograph or Collective Volume | King | 1911 |
| How devolution died : the British Labour Party's constitutional agenda, 1900-45 | Tanner, Duncan | Article in Book | | 2006 |
| Hugh Williamson : historian, minister, doctor and congressman | Hannon, W. B. | Article in Journal | | 1911 |
| I bPrionta i Leabhar : na Protastúin agus Prós na Gaeilge 1567-1724 | Williams, Nicholas | Monograph or Collective Volume | An Clóchomhar|Cló Iar-Chonnach | 1986 |
| Icons of Irishness from the middle ages to the modern world | Williams, Maggie | Monograph or Collective Volume | Palgrave Macmillan | 2012 |
| Ifor Williams's Lectures on early Welsh Poetry, Dublin Institute for Advanced Studies, 1943 | Haycock, Marged | Article in Book | | 2025 |
| Ilteangach ilseiftiúil: féilscríbhinn in ómós do Nicholas Williams: a festschrift in honour of Nicholas Williams | | Monograph or Collective Volume | | 2012 |
| Images of Ireland : the Easter rising in the work of Sidney Gifford Czira, 1889-1974 | Annat, Aurelia L. S. | Article in Book | | 2010 |
| Imaginative literature and the revolution | MacManus, Francis | Article in Book | | 1968 |
| Immigrants and minorities in Wales, 1840-1990 : a comparative perspective | Evans, Neil | Article in Book | | 2003 |
| Imperial funds spent in Ireland | Williams, William J. | Article in Journal | | 1912 |
| In and out of school; the home of the MacDonaghs | Williams, Roche | Monograph or Collective Volume | Nenagh Guardian | 1999 |
| Index to Ordnance Survey Memoirs of Ireland series : people and places | McWilliams, Patrick | Monograph or Collective Volume | Institute of Irish Studies | 2002 |
| Industry and labour | Nevin, Donal | Article in Book | | 1969 |
| Inter-tidal archaeology in Strangford Lough | Williams, Brian | Article in Journal | | 1996 |
| International migration, 1850-1939 : an economic survey | Hatton, Timothy J.Williamson, Jeffrey G. | Article in Book | | 1994 |
| Intertidal archaeology in Strangford Lough | Williams, Brian | Article in Journal | | 1996 |
| Into the west : landscape and imperial imagination in Connemara, 1820-1870 | Williams, William Henry Allen | Article in Journal | | 1998 |
| Introduction | Griffin, Brian | Article in Book | | 2010 |
| Introduction | Williams, T. Desmond | Article in Book | | 1973 |
| Introduction [New perspectives on Irish literature] | McWilliams, Ellen | Article in Book | | 2010 |
| Iohannis Scotti Eriugenae Periphyseon (de diuisione naturae) | | Monograph or Collective Volume | | 1981 |
| Ireland and sixteenth-century European expansion | Quinn, D. B. (David Beers) | Article in Book | | 1958 |
| Ireland and the British Commonwealth : the Dominion Settlement | Mansergh, Nicholas, 1910-1991 | Article in Book | | 1966 |
| Ireland and the war | Williams, T. Desmond | Article in Book | | 1969 |
| Ireland in the War Years and After, 1939-51 | | Monograph or Collective Volume | | 1969 |
| Ireland on the eve of the Famine | McDowell, R. B. (Robert Brendan), 1913-2011 | Article in Book | | 1994 |
| Ireland's place in European civilisation | Williams, W. J. | Article in Book | | 1935 |
| Ireland, Elizabeth I and the Counter-Reformation | Edwards, R. W. D. (Robert Walter Dudley) | Article in Book | | 1961 |
| Irish and Armenian Ecclesiastics in Medieval Iceland | Cormack, Margaret | Article in Book | | 2007 |
| Irish cultural politics, Thomas McGreevy and the Avant-Garde, 1922-1941 | Hutton-Williams, Francis Brent | Thesis | | |
| Irish defence policy, 1938-51 | Hayes-McCoy, G. A. (Gerard Anthony) | Article in Book | | 1969 |
| Irish emigration to the United States of America and the British colonies during the famine | MacDonagh, Oliver | Article in Book | | 1994 |
| Irish emigration to the United States of America and the British colonies during the famine | MacDonagh, Oliver | Article in Book | | 1956 |
| Irish Female Convicts and Tasmania | Williams, John | Article in Journal | | 1983 |
| Irish foreign policy, 1945-51 | Mansergh, Nicholas, 1910-1991 | Article in Book | | 1969 |
| Irish foreign policy, 1949-69 | Williams, T. Desmond | Article in Book | | 1979 |
| Irish heroes in red war : Alice Cooke and the poetry of Ulster unionism | Winterson, Kieron | Article in Book | | 2010 |
| Irish home rule as devolutionary paradigm, 1914-39 | McMahon, Deirdre | Article in Book | | 2006 |
| Irish identity and the Illustrated London News, 1846-1851 : famine to depopulation | Williams, L. | Article in Book | | 1997 |
| Irish in the East Cheshire silk industry, 1851-1861 | Williams, F. J. | Article in Journal | | 1987 |
| Irish influence on medieval Welsh literature | Sims-Williams, Patrick | Monograph or Collective Volume | Oxford University Press | 2011 |
| Irish studies in Britain : new perspectives on history and literature | | Monograph or Collective Volume | Cambridge Scholars | 2010 |
| Irish traditional music in the United States | Williams, William Henry Allen | Article in Book | | 1980 |
| Irishness and the culture of the Irish abroad | McWilliams, EllenMurray, Tony | Article in Journal | | 2018 |
| It's a long way to go... From Tarsan to New Zealand: 1861-91 | Gilpin, Jack | Article in Journal | | 2012 |
| Jack Williams : son of Tullamore, an Irish artillery officer in the first world war | Fennell, Frank | Article in Journal | | 2005 |
| James Barry, 1741-1806 : 'The Great Historial Painter' | Dunne, Tom, 1939- | Monograph or Collective Volume | Crawford Art Gallery and Gandon Editions | 2005 |
| James G. Delany (1916-2000) - scholar and folklore collector | Williams, Tom | Article in Journal | | 2012 |
| Jane Williams, an outstanding 19th-century Cork silversmith | Ahern, Fiona | Article in Journal | | 2012 |
| Jeremiah White | Williams, Tom | Article in Journal | | 2001 |
| Jeremy Taylor | Williamson, H. R. | Monograph or Collective Volume | | 1952 |
| John Devoy and Jeremiah O'Donovan Rossa | Williams, T. Desmond | Article in Book | | 1968 |
| John J. Marshall MA: The historian of the northern Blackwater | Knox, Wolsley | Article in Journal | | 2010 |
| John Ponce's response to Kenelm Digby's 'A discourse concerning infallibility in religion' (Paris, 1652) | | Article in Journal | | 2012 |
| John Wesley 1703-1791 : a bicentennial tribute | Walsh, John, 1927- | Monograph or Collective Volume | Dr. Williams's Trust | 1995 |
| Journal of John Fontaine : an Irish Huguenot son in Spain and Virginia, 1710-1719 | Alexander, E. P.Fontaine, John, 1693-1767 | Monograph or Collective Volume | University Press of Virginia | 1972 |
| Journal to Stella | Swift, Jonathan, 1667-1745Williams, Harold | Monograph or Collective Volume | | 1974 |
| Joyce's 'Chinese alphabet' : 'Ulysses' and the proletarians | Williams, Keith | Article in Book | | 1991 |
| K. B. Williams and sons, Mallow | Power, C. | Article in Journal | | 1997 |
| Keeping the Irish down and the Spanish out : English strategies of submission in Ireland, 1594-1603 | Lee, Wayne E. | Article in Book | Cambridge University Press | 2012 |
| Kilfane Church of Ireland | Williams, Miriam | Article in Journal | | 1994 |
| Kilnalag to Williamstone, north county Galway, 1820-1850 | Mulryan-Moloney, Maeve | Article in Book | | 2004 |
| Lagan and Clyde shipbuilding | Moss, Michael S. | Article in Book | | 1996 |
| Language and governance (Politics and society in Wales) | | Monograph or Collective Volume | University of Wales | 2007 |
| Language, law and governance, an Irish perspective | Ó Catháin, Leachlain | Article in Book | | 2007 |
| Larcom the cartographer: political economy in pre-Famine Ireland | McWilliams, Patrick | Article in Journal | | 2008 |
| Latin oratory in seventeenth-century Dublin | Harris, Jason | Article in Book | | 2017 |
| Leagan cainte in Párliament na mBan | Williams, N. J. A. | Article in Journal | | 1978 |
| Leprechauns and Luperci, Aldhelm and Augustine | Sims-Williams, Patrick | Article in Book | | 2015 |
| Literature and society, 1938-51 | Martin, Augustine | Article in Book | | 1969 |
| Litriú na Gaeilge | Ahlqvist, Anders | Article in Book | Roinn na Sean-Gaeilge, Coláiste Phádraig, Maigh Nuad | 1994 |
| Living on the Edge : Scandinavian Dublin in the Twelfth Century | Downham, Clare | Article in Book | | 2007 |
| Magnum Ireland | | Monograph or Collective Volume | Thames & Hudson | 2005 |
| Major general Anthony Wayne | Bicknell, Thomas Williams | Article in Journal | | 1911 |
| Maritime archaeology in Northern Ireland | Breen, ColinWilliams, Brian | Article in Journal | | 1996 |
| Maritime archaeology in Northern Ireland | McErlean, ThomasWilliams, B. | Article in Journal | | 2002 |
| Mary Davys and the Politics of Epistolary Form | Wakely, Alice | Article in Book | | 2005 |
| Masculinity and violence : a gender perspective on crime in Northern Ireland | McWilliams, Monica | Article in Book | | 1996 |
| Material culture as memory : combs and cremation in early medieval Britain | Williams, Howard, 1972- | Article in Journal | | 2003 |
| Maypoles on the 'Road to Richhill' and beyond | Williams, Fionnuala Carson | Article in Journal | | 2011 |
| Medical history of the famine | MacArthur, William, Sir | Article in Book | | 1956 |
| Medical history of the famine | Mac Arthur, William P. | Article in Book | | 1994 |
| Megalithic art on the Great Circle at Newgrange and the implications for chronology | Williams, Ken | Article in Journal | | 2023 |
| Meilyr Brydydd and Gruffudd ap Cynan | Williams, John Ellis Caerwyn, 1912-1999 | Article in Book | | 1996 |
| Memory, belief and identity : remembering the dead on Iniscealtra, Co. Clare | O'Leary, Clíodhna | Article in Book | | 2015 |
| Mendicant orders in Ireland | Williams, Bernadette | Article in Book | | 2006 |
| Mercantilism and Ireland, 1620-40 | Kearney, H. F. | Article in Book | | 1958 |
| Michael Collier (1780 to 1849) as folk hero 'robbing from the rich...' | Williams, Fionnuala Carson | Article in Journal | | 2021 |
| Migration and residential patterns in mid-nineteenth century Cardiff | Williams, A. M. | Article in Journal | | 1979 |
| Migration and the international labor market 1850-1939 | | Monograph or Collective Volume | Routledge | 1994 |
| Missing in action | Ó Ruairc, Pádraig Óg | Article in Journal | | 2012 |
| Missing in action - British servicemen secretly buried in Clare during the War of Independence | Ó Ruairc, Padraig Óg | Article in Journal | | 2012 |
| Moran, Mannix and St Patrick's Day | Williams, Caroline M. | Article in Book | | 2000 |
| Moray, Ulster and MacWilliams | Ross, Alasdair | Article in Book | | 2007 |
| More light on Cromwell at Drogheda : a rejoinder to Dr. Murray | Williams, Joseph Batterson [i.e. Muddiman, Joseph George] | Article in Journal | | 1913 |
| More on Ptolemy's evidence for Celtic Ireland | Bernardo Stempel, Patrizia de | Article in Book | | 2005 |
| Na canúintí a theacht chun solais | Williams, Nicholas | Article in Book | | 1994 |
| Nature, politics and historians in early modern Ireland | Gillespie, Raymond | Article in Book | | 2010 |
| Nécrologie : J. E. Caerwyn Williams 1912-1999 | Mac Cana, Proinsias | Article in Journal | | 1999 |
| New approaches to Celtic place-names in Ptolemy's Geography | | Monograph or Collective Volume | Ediciones Clásicas | 2005 |
| New introduction and bibliography | Ó Gráda, Cormac | Article in Book | | 1994 |
| New perspectives on women and the Irish diaspora | McWilliams, Ellen | Article in Journal | | 2013 |
| Newman's Irish adventure | Williams, William J. | Article in Journal | | 1951 |
| Notable figures with Longford family ties | O'Hara, Aidan | Article in Journal | | 2007 |
| Notaí éagsúla ar Phairlement Chloinne Tomáis | Williams, N. J. A. | Article in Journal | | 1978 |
| Ó Chaint na ndaoine go dtí an Caighdeán Oifigiúil. | Ó Háinle, Cathal | Article in Book | | 1994 |
| O'Connell's impact on Europe | Williams, T. Desmond | Article in Book | | 1984 |
| Obituary. Daniel Edmond Williams, 1928-2007 | Byrne, Michael | Article in Journal | | 2011 |
| Of beasts and banners : the origins of the heraldic enfield | Williams, N. J. A. | Article in Journal | | 1989 |
| On the eve of war | Nowlan, Kevin B. | Article in Book | | 1969 |
| Once upon a life : Irish autobiography and the Irish short story | Lynch, Claire | Article in Book | | 2010 |
| One singer, two voices : Scots and Irish style song in the work of the mid-Antrim poet and song-maker Hugh McWilliams (fl.1816-1831) | Moulden, John | Article in Book | | 1998 |
| Ordered to the Island : Irish convicts and Van Diemen's Land | Davis, RichardWilliams, John | Monograph or Collective Volume | Crossing Press | 1994 |
| Ordnance survey memoirs of Ireland (1830-1840) | McWilliams, Patrick | Article in Journal | | 1992 |
| Our scientific heritage : an A-Z of Great Britain and Ireland. | Williams, Trevor I. | Monograph or Collective Volume | Sutton | 1996 |
| Overcoming the "Contagion of Mimicry" : The Cosmopolitan Nationalism and Modernist History of Rabindranath Tagore and W. B. Yeats | Williams, Louise Blakeney | Article in Journal | | 2007 |
| Owain Glyndŵr's appeal to the Irish lords in 1401 and a Welsh prophecy about a lion in Ireland | Sims-Williams, Patrick | Article in Book | | 2025 |
| Packet to Ireland : Porthdinllaen's challenge to Holyhead | Elis-Williams, M. | Monograph or Collective Volume | | 1984 |
| Pairlement Chloinne Tomáis | | Monograph or Collective Volume | Institute for Advanced Studies | 1981 |
| Pairlement Chloinne Tomáis agus lomadh na hÉireann | Williams, Nicholas | Article in Book | | 2008 |
| Parishes of County Antrim, 1832-8. Vol. 2 : Lisburn and South Antrim | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1991 |
| Parishes of County Antrim, 1838-9. Vol. 1 : Ballymartin, Ballyrobert, Ballywalter, Carnmoney, Mallusk | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1990 |
| Parishes of County Antrim, XIV : 1832, 1839-40 : Carrickfergus | | Monograph or Collective Volume | Queen's University of Belfast, Institute of Irish Studies, in association with the Royal Irish Academy | 1996 |
| Parishes of County Antrim. Vol. 10 : 1830-1, 1833-5, 1839-40 : East Antrim : Glynn, Inver, Kilroot and Templecorran | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1994 |
| Parishes of County Antrim. Vol. 11 : 1832-3, 1835-9 : Antrim town and Ballyclare | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1995 |
| Parishes of County Antrim. Vol. 12 : 1832-3, 1835-40 : Ballynure and district | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1995 |
| Parishes of County Antrim. Vol. 3 : 1833, 1835, 1839-40 : Larne and Island Magee | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1991 |
| Parishes of County Antrim. Vol. 4 : 1830-8 : Glens of Antrim | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1992 |
| Parishes of County Antrim. Vol. 5 : 1830-5, 1837-8 : Giant's Causeway and Ballymoney | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1992 |
| Parishes of County Antrim. Vol. 6 : 1830, 1833, 1835-8 : South West Antrim | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1993 |
| Parishes of County Antrim. Vol. 7 : 1832-8 : South Antrim | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1993 |
| Parishes of County Antrim. Vol. 8 : 1831-5, 1837-8 : Ballymena and West Antrim | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1993 |
| Parishes of County Antrim. Vol. 9 : 1830-2, 1835, 1838-9 : North Antrim coast and Rathlin | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1993 |
| Parishes of County Armagh, 1835-8 | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1990 |
| Parishes of County Donegal. Vol. 1 : 1833-35 : North-east Donegal | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1997 |
| Parishes of County Donegal. Vol. 2 : 1835-36. Mid, west and south Donegal | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1997 |
| Parishes of County Down, 1832-4, 1837. Vol. 2 : North Down and the Ards | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1991 |
| Parishes of County Down, 1834-6. Vol. 1 : South Down | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1990 |
| Parishes of County Down. Vol. 3 : 1833-8 : Mid-Down | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1992 |
| Parishes of County Down. Vol. 4 : 1833-7 : East Down and Lecale | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1992 |
| Parishes of County Fermanagh, 1834-5. Vol. 1 : Enniskillen and Upper Lough Erne | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1990 |
| Parishes of County Fermanagh. Vol. 2 : 1834-5 : Lower Lough Erne | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1992 |
| Parishes of County Londonderry, 1830, 1834, 1836. Vol. 1 : Arboe, Artrea, Ballinderry, Ballyscullion, Magherafelt, Termoneeny | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1990 |
| Parishes of County Londonderry, 1833-5. Vol. 2 : Roe Valley Central | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1991 |
| Parishes of County Londonderry, X : 1833-5, 1838 : Mid-Londonderry | | Monograph or Collective Volume | Queen's University of Belfast, Institute of Irish Studies, in association with the Royal Irish Academy | 1995 |
| Parishes of County Londonderry, XI : 1821, 1833, 1836-7 : South Londonderry | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1995 |
| Parishes of County Londonderry, XII 1829-30, 1832, 1834-36 : Coleraine and Mouth of the Bann | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1995 |
| Parishes of County Londonderry. Vol. 14 : 1833-4, 1836, 1838 : Faughanvale | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1996 |
| Parishes of County Londonderry. Vol. 3 : 1831-5 : Roe Valley Lower | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1991 |
| Parishes of County Londonderry. Vol. 4 : 1824, 1833-5 : Roe Valley Upper | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1992 |
| Parishes of County Londonderry. Vol. 5 : 1830, 1833, 1836-7 : Maghera and Tamlaght O'Crilly | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1993 |
| Parishes of County Londonderry. Vol. 6 : 1831, 1833, 1835-6 : North-East Londonderry | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1993 |
| Parishes of County Londonderry. Vol. 7 : 1834-5. North-west Londonderry | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1994 |
| Parishes of County Londonderry. Vol. 8 : 1830, 1833-7, 1839 : East Londonderry | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1994 |
| Parishes of County Londonderry. Vol. 9 : 1832-8 : West Londonderry | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1995 |
| Parishes of County Tyrone, 1821, 1823, 1831-6. Vol. 1 : North, West and South Tyrone | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1990 |
| Parishes of County Tyrone. Vol. 2 : 1825, 1833-5, 1840 : Mid and East Tyrone | | Monograph or Collective Volume | Institute of Irish Studies in association with the Royal Irish Academy | 1993 |
| Partition : the Ulster question (1916-1926) | Wall, Maureen (née Mac Geehin) | Article in Book | | 1968 |
| Patterns of British identity : "Britain" and its rivals in the sixteenth and seventeenth centuries | Williamson, Arthur H. | Article in Book | | 1999 |
| Personal names and the cult of Patrick in eleventh-century Strathclyde and Northumbria | Edmonds, Fiona | Article in Book | | 2009 |
| Pestalozzi and John Synge | Williams, Clive | Article in Book | | 2000 |
| Pestalozzi and John Synge | Williams, Clive | Article in Journal | | 1968 |
| Playing the game : sport and ethnic minorities in modern Wales | Evans, NeilO'Leary, Paul | Article in Book | | 2003 |
| Poems of Hugh McWilliams, schoolmaster, 1831 | Moulden, John | Article in Journal | | 1996 |
| Policy for higher education in Northern Ireland : the New University of Ulster and the origins of the University of Ulster | Williamson, Arthur P. | Article in Journal | | 1993 |
| Politics and Topography in the Old House of Commons, 1738-1834 | Williamson, Clare | Article in Book | | 2002 |
| Politics in Ireland | Kinealy, Christine | Article in Book | | 2004 |
| Potain's Day | McWilliams, Brendan | Article in Journal | | 2005 |
| Princes of Ireland, planters of Maryland : a Carroll saga, 1500-1782 | Hoffman, RonaldMason, Sally D. | Monograph or Collective Volume | University of North Carolina Press for the Omohundro Institute of Early American History and Culture, Williamsburg, Virginia. | 2000 |
| Private memories, public display : jewellery, souvenirs, and tattoos as icons of Irishness | Williams, Maggie | Article in Book | | 2012 |
| Privilege and poverty : the life and times of Irish painter and naturalist Alexander Williams, RHA | Ledbetter, Gordon T. | Monograph or Collective Volume | Collins Press | 2010 |
| Proverbs - the schools' collection : department of Irish folklore, University College Dublin as a source for research | Williams, Fionnuala | Article in Journal | | 1981 |
| Pseudo-Dionysius, Gilbert of Limerick and Innocent III : order, power and constitutional construction | Williamson, Shannon M. O. | Article in Book | | 2006 |
| Public opinion and the railway rates question in 1886 | Williams, P. M. | Article in Journal | | 1952 |
| Putting women in the picture: the impact of the Northern Ireland Women's Coalition on Northern Irish politics | Molinari, Véronique | Article in Journal | | 2007 |
| Quotation proverbs in Ireland | Williams, Fionnuala | Article in Book | | 2001 |
| Radical movements in the twenties and thirties | Nevin, Donal | Article in Book | | 1973 |
| Rates on Tory Island | Williams, J. D. | Article in Journal | | 1985 |
| Rathlin Island | McWilliams, Shirley M. | Article in Journal | | 1982 |
| Reactions to the Ordnance Survey : a window on prefamine Ireland | McWilliams, Patrick S. | Article in Journal | | 2009 |
| Reconstructing an early Bronze Age halberd | O'Flaherty, RonanRankin, BoydWilliams, Lynne | Article in Journal | | 2002 |
| Reissues in the Dublin book trade : the case of George Grierson and William Williamson | Elias, A. C. | Article in Book | | 2005 |
| Religious discrimination in Scotland : A rebuttal of Bruce et al.'s claim that sectarianism is a myth | Walls, PatriciaWilliams, Rory | Article in Journal | | 2005 |
| Rerkindling the Solstice Light...the restoration of the Newgrange roof-box | Williams, Ken | Article in Journal | | 2019 |
| Researching Charles Henry Williams | Goodwillie, John | Article in Journal | | 2017 |
| Resting places : on wounds, war and the Irish revolution | McWilliams, Ellen | Monograph or Collective Volume | Beyond the Pale Books | 2023 |
| Restoration | Williams, Mark R.F. | Article in Book | Oxford University Press | 2023 |
| Review article. Inland waterways as a military theme | Ferguson, Kenneth | Article in Journal | | 2018 |
| Rhododendron ponticum in Britain and Ireland : Social, Economic and Ecological Factors in its Successful Invasion | Dehnen-Schmutz, KatharinaWilliamson, Mark | Article in Journal | | 2006 |
| Richard Dalton Wuilliams - Shamrock of 'The Nation' | Boland, Tim | Article in Journal | | 2014 |
| Richard Rowley | Williams, Michael | Article in Journal | | 1978 |
| Riders to the Sea de Ralph Vaughan Williams : Un hymne à la mer, indomptable et indomptée, qui unit les nations | Le Doussal, Florence | Article in Journal | | 2006 |
| Robert Williamson of Lambeg House | Black, Eileen | Article in Journal | | 1978 |
| Roman olla dredged up on the Porcupine Bank, 150 miles to the west of Ireland | Nash-Williams, Victor Erle, 1897-1955 | Article in Journal | | 1946 |
| Saints' cults in the Celtic world | | Monograph or Collective Volume | Boydell Press | 2009 |
| Sam Williams remembers, in an interview with John Power | Power, JohnWilliams, Sam | Article in Journal | | 2005 |
| Scotch-Irish in Southern Appalachia | Williams, Cratis | Article in Book | | 1981 |
| Scotland and the British revolutions | Williamson, Arthur H. | Article in Journal | | 1994 |
| Sea raiders in the waters between Anglesey and Ireland during the 17th & 18th centuries | Williams, M. L. | Article in Journal | | 1946 |
| Secret love : my life with Father Michael Cleary | Hamilton, PhyllisWilliams, Paul | Monograph or Collective Volume | Mainstream | 1995 |
| Secret societies in Ireland | | Monograph or Collective Volume | Gill & Macmillan | 1973 |
| Sectarianism at work : Accounts of employment discrimination against Irish Catholics in Scotland | Walls, PatriciaWilliams, Rory | Article in Journal | | 2003 |
| Separated from the foaming maelstrom : landscapes of insular 'Viking' burial | Harrison, Stephen H. | Article in Journal | | 2008 |
| Service and survival : the impact of Irish Royalists in the exiled court of Charles II, 1649-1660 | Williams, Mark | Article in Book | | 2010 |
| Seventeenth-century constructions of the historical kingdom of Ireland | Cunningham, Bernadette | Article in Book | | 2010 |
| Silva gadelica : a collection of tales in Irish. 2 vols. | | Monograph or Collective Volume | Williams & Norgate | 1892 |
| Singing the famine : Joe Heaney, 'Johnny Seoighe' and the poetics of performance | Williams, SeanÓ Laoire, Lillis | Article in Book | | 2007 |
| Sinn Féin policy and practice (1916-1926) | Ryan, Desmond | Article in Book | | 1968 |
| Sir Ifor Williams : a bibliography | Davies, A. E. | Article in Journal | | 1969 |
| Sir Walter Raleigh | Williams, N. L. | Monograph or Collective Volume | | 1962 |
| Sir William McCrea, 1904-1999 | Williams, J. | Article in Book | | 2003 |
| Some Irish plant names | Williams, N. J. A. | Article in Book | | 1989 |
| Some notes on Charles Wye Williams, his family, their life and times | Smyth, Hazel | Article in Journal | | 1996 |
| Some problems in deciphering the early Irish Ogam alphabet | Sims-Williams, Patrick | Article in Journal | | 1993 |
| Some thoughts on early Irish roads and travel | Charles-Edwards, T. M. (Thomas Mowbray) | Article in Book | | 2012 |
| Soundings in the sources of his power : the education of Seamus Heaney | Williams, Kevin | Article in Journal | | 2019 |
| Spirals, lozenges and a 'Christmas tree'.An introduction to the megalithic art of the Dowth Hall passage tomb | Corns, AnthonyNí Lionáin, ClíodhnaO'Sullivan, MuirisShaew, RobWilliams, Ken | Article in Journal | | 2022 |
| Splendid impositions : Gainsborough, Berkeley, Hume | Asfour, AmalWilliamson, Paul | Article in Journal | | 1998 |
| St. Columba's, the old church at Straid, Clonmany, Inishowen | McWilliams, Catherine | Article in Journal | | 2003 |
| St. Mochua and the round tower | Williams, Joe | Monograph or Collective Volume | South Dublin Libraries | 2006 |
| Stair na Gaeilge : in ómós do Pádraig Ó Fiannachta | | Monograph or Collective Volume | Roinn na Sean-Gaeilge, Coláiste Phádraig | 1994 |
| Stories from a sacred landscape : Crogan Hill to Clonmacnoise | O'Brien, Caimin | Monograph or Collective Volume | Offaly County Council|Mercier Press | 2006 |
| Struggling for peace and justice : reflections on women's activism in Northern Ireland | McWilliams, Monica | Article in Journal | | 1995 |
| Studies in early Irish law | Binchy, D. A. (Daniel Anthony), 1900-1989Dillon, MylesKnoch, AugustMulchrone, KathleenPower, NancyRyan, JohnThurneysen, R. | Monograph or Collective Volume | Hodges Figgis|Williams & Norgate | 1936 |
| Surveyors and surveying in James Williamson's autobiography | Andrews, J. H. (John Harwood) | Article in Journal | | 1991 |
| Swift's early biographers | Williams, H. | Article in Book | | 1949 |
| Swift's modest proposer and Shaftesbury | Holmes, Richard | Article in Book | | 2010 |
| T. Desmond Williams (1921-87) | McGuire, James | Article in Journal | | 1988 |
| Tadhg Ó Cianáin, na taoisigh Ultacha agus Assisi | Mac Craith, Mícheál | Article in Book | | 2012 |
| Taghmon in 1798 | Williams, Tom | Article in Journal | | 1997 |
| Taghmon village - the 1901 census | Waters, DesWilliams, Tom | Article in Journal | | 2001 |
| Taking the troubles across the Atlantic : Ireland's UN initiatives and Irish-US diplomatic relations in the early years of the conflict in Northern Ireland, 1969-1972 | Williamson, Daniel | Article in Journal | | 2007 |
| Tales of the Wexford coast : with a list of shipwrecks and groundings | Roche, RichardWilliams, Tom | Monograph or Collective Volume | Duffry Press | 1993 |
| Templetogher Mill and heritage area | Finnegan, Leo | Article in Journal | | 2009 |
| Thanks Mr. Daly | Williams, Marjorie | Article in Journal | | 1988 |
| The "Kilkenny Chronicle" | Williams, Bernadette | Article in Book | | 1995 |
| The 'Annals of Multyfarnham': Roscommon and Connacht provenance | | Monograph or Collective Volume | Four Courts Press | 2012 |
| The 'temple of industry' : Dublin's industrial exhibition of 1853 | Williams, Maggie McEnchroe | Article in Book | | 2004 |
| The 1688 revolution in Ireland and the memory of 1641 | Ansell, Richard | Article in Book | | 2010 |
| The additional letters of the Ogam alphabet | Sims-Williams, Patrick | Article in Journal | | 1992 |
| The additional letters of the Ogam alphabet | Simms-Williams, Patrick | Article in Journal | | 1992 |
| The age of mass migration : causes and economic impact | Hatton, Timothy J.Williamson, Jeffrey | Monograph or Collective Volume | Oxford University Press | 1998 |
| The aggrandisement of Armagh | De Paor, Liam | Article in Book | | 1971 |
| The annals of friar John Clynn : provenance and bias | Williams, Bernadette | Article in Journal | | 1993 |
| The Annals of Ireland by Friar John Clyn: Edited and translated with an Introduction by Bernadette Williams | Clyn, John, d. 1349?
| Monograph or Collective Volume | Four Courts Press | 2007 |
| The annals of John de Pembridge as a source for the history of Dublin and its hinterland | Williams, Bernadette | Article in Book | | 2023 |
| The archaeology of rural settlements in Ireland | Williams, Brian | Article in Journal | | 1989 |
| The arrivals of the Dominicans in Ireland in 1224 and the question of Dublin and Drogheda : the sources re-examined | Williams, Bernadette | Article in Book | | 2013 |
| The autobiography of Gerald of Wales | Butler, Harold EdgeworthGerald, of Wales, c.1146-1220x23 | Monograph or Collective Volume | Boydell | 2005 |
| The autobiography of Giraldus Cambrensis | Gerald, of Wales, c.1146-1220x23 | Monograph or Collective Volume | Cape | 1937 |
| The ballad of Marcus Lyon : the story lives on | Williams, Melvin G. | Article in Journal | | 1988 |
| The beginnings of state care for the mentally ill in Ireland | Williamson, Arthur P. | Article in Journal | | 1970 |
| The Belfast harpers festival 1782 ... and 1988 | Williamson, Noel | Article in Journal | | 1988 |
| The Black Death in Kilkenny | Williams, Bernadette | Article in Book | | 2016 |
| The Black Pig and linear earthworks | Williams, Fionnuala | Article in Journal | | 1987 |
| The Boundary Commission and Donegal | Williams, J. D. | Article in Journal | | 1990 |
| The Celtic inscriptions of Britain : phonology and chronology, c.400-1200 | Sims-Williams, Patrick | Monograph or Collective Volume | Blackwell Publishers | 2003 |
| The Celts and the Renaissance : Tradition and Innovation - proceedings of the Eighth International Congress of Celtic Studies 1987. | | Monograph or Collective Volume | | 1990 |
| The changing pattern of Irish society, 1938-51 | Quinn, Gerard | Article in Book | | 1969 |
| The church, the state and the women's movement in Northern Ireland | McWilliams, Monica | Article in Book | | 1993 |
| The churches and secret societies | McCartney, Donal | Article in Book | | 1973 |
| The college and the nation | Williams, Thomas | Article in Book | | 1954 |
| The conduct of the Anglo-Irish war, 1919-1921 | Hayes-McCoy, G. A. (Gerard Anthony) | Article in Book | | 1968 |
| The Connaught Army and the Confederate Catholics, 1642-1649 | Williams, Andrew | Article in Journal | | 2008 |
| The contribution of Ireland to medieval vision literature | Williams, John Ellis Caerwyn, 1912-1999 | Article in Journal | | 1944 |
| The conversion of the English to Christianity : some comments on the Celtic contribution | Loyn, Henry Royston | Article in Book | | 1984 |
| The correspondence of Jonathan Swift | Swift, Jonathan, 1667-1745Williams, Harold | Monograph or Collective Volume | | 1963 |
| The council in Munster in the late sixteenth century | Williams, Penry | Article in Journal | | 1961 |
| The counter-reformation and the people of catholic Ireland, 1596-1641 | Bossy, John | Article in Book | | 1971 |
| The court poet in medieval Ireland | Williams, John Ellis Caerwyn, 1912-1999 | Article in Journal | | 1973 |
| The cults of saints Patrick and Palladus in early medieval Scotland | Clancy, Thomas Owen | Article in Book | | 2009 |
| The Curragh of yesterday | Williams, Charles | Article in Journal | | 1947 |
| The depositions about the Irish rebellion of 1641 | Williams, Joseph Batterson [i.e. Muddiman, Joseph George] | Article in Journal | | 1920 |
| The development of maritime archaeology in Northern Ireland | Williams, Brian | Article in Journal | | 1998 |
| The development of the Indo-European voiced labiovelars in Celtic | Sims-Williams, Patrick | Article in Journal | | 1981 |
| The discovery of an early 18th-century boat in Loch Neagh | Wilkinson, DavidWilliams, Brian | Article in Journal | | 1996 |
| The Dominican annals of Dublin | Williams, Bernadette | Article in Book | | 2001 |
| The double system of verbal inflexion in Old Irish | Sims-Williams, Patrick | Article in Journal | | 1984 |
| The Dublin annals of Prior John de Pembridge OP and his Dominican continuator : an account of Irish affairs, 1162-1370 | | Monograph or Collective Volume | Four Courts Press | 2024 |
| The earliest Celtic ethnography | Sims-Williams, Patrick | Article in Journal | | 2017 |
| The early development of metallurgy in the British Isles | Budd, P.Gale, D.Pollard, A. M.Thomas, R. G.Williams, P. | Article in Journal | | 1992 |
| The early Orange Older, 1795-1870 | Senior, Hereward | Article in Book | | 1973 |
| The elusive Sir Edward Lovett Pearce | Williams, Jeremy | Article in Journal | | 2000 |
| The evidence of vernacular Irish literary influence on early medieval Welsh literature | Sims-Williams, Patrick | Article in Book | | 1982 |
| The excavation of an early Christian rath with later medieval occupation at Drumadoon, co. Antrim | McSparron, CormacWilliams, Brian | Article in Journal | | 2009 |
| The excavation of Bronze Age cists and a medieval booley house at Glenmakeeran, county Antrim | Williams, B. B. | Article in Journal | | 1983 |
| The famine in Irish oral tradition | McHugh, Roger Joseph | Article in Book | | 1994 |
| The Fenians abroad | Green, E. R. R. | Article in Book | | 1973 |
| The Fenians at home | Nowlan, Kevin B. | Article in Book | | 1973 |
| The fiery campaign : new agendas and ancient enmities in the Irish civil war : a study of arson in three Munster counties | Clark, Gemma | Article in Book | | 2010 |
| The first motor car and early Irish motoring and assembly | Byrne, DonalDowdall, DenisWilliams, Noel | Article in Journal | | 1999 |
| The Fitzwilliams of Merrion - the last of the line | Smyth, Des | Article in Journal | | 2017 |
| The folly of rationalist politics: Michael Oakeshott and the revival of Irish | Williams, Kevin | Article in Journal | | 2014 |
| The form and structure of Viking-age silver hoards : the evidence from Ireland | Sheehan, John | Article in Book | | 2007 |
| The freemasons | White, Terence De Vere | Article in Book | | 1973 |
| The General : godfather of crime | Williams, Paul | Monograph or Collective Volume | O'Brien Press | 1995 |
| The good room : how Ireland ended up in a debtors' prison - and how we can break free | McWilliams, David | Monograph or Collective Volume | Penguin | 2012 |
| The government and the army | Pollock, Arthur Williamson Alsager | Article in Journal | | 1914 |
| The great famine : studies in Irish history, 1845-52 | | Monograph or Collective Volume | Browne and Nolan | 1956 |
| The great famine : studies in Irish history, 1845-52 | | Monograph or Collective Volume | Lilliput Press | 1994 |
| The great question debated | Rothschild, N. M. V.Williams, Harold | Article in Journal | | 1939 |
| The Hartys of Springfield | Williams, Guy St. John | Monograph or Collective Volume | Independently published - Guy St. John Williams | 2020 |
| The history and antiquities of the city of Dublin, from the earliest accounts compiled from authentic memoirs | Harris, Walter | Monograph or Collective Volume | Davidson | 1994 |
| The impact of emigration on real wages in Ireland, 1850-1914 | Boyer, George R.Hatton, Timothy J.O'Rourke, Kevin H. | Article in Book | | 1994 |
| The impact of the Irish on British labor markets during the industrial revolution | Williamson, J. G. | Article in Book | | 1989 |
| The impact of the Irish on British labor markets during the industrial revolution | Williamson, J. G. | Article in Journal | | 1986 |
| The Impact of the Irish on British Labour Markets during the Industrial Revolution | Williams, J. G. | Article in Journal | | 1986 |
| The imperial factor in the Liberal decline, 1880-1885 | Marshall, Peter, 1926- | Article in Book | NA | 1973 |
| The international dimension of the Northern Ireland peace process : an introduction to the subject | Williams, Sir David | Article in Journal | | 1997 |
| The invention of Celtic nature poetry | Sims-Williams, Patrick | Article in Book | | 1996 |
| The Invincibles | Ó Broin, León, 1902-1990 | Article in Book | | 1973 |
| The Irish châteaux : in search of the descendants of the Wild Geese | Holohan, RenaghWilliams, Jeremy | Monograph or Collective Volume | Lilliput Press | 1989 |
| The Irish College at Santiago de Compostela : two documents about its early days | Davies, Gareth | Article in Book | | 1987 |
| The Irish Derby, 1866-1979 | Hyland, Francis P. M.Williams, Guy St. John | Monograph or Collective Volume | | 1980 |
| The Irish Derby, 1866-1979 | Hyland, Francis P. M.Magee, SeanWilliams, Guy St. John | Monograph or Collective Volume | Racing Post Books | 2015 |
| The Irish economy during the war | Meenan, James | Article in Book | | 1969 |
| The Irish economy since the war, 1946-1951 | Lynch, Patrick, 1917-2001 | Article in Book | | 1969 |
| The Irish economy since the war, 1946-51 | Lynch, Patrick, 1917-2001 | Article in Book | | 1969 |
| The Irish geography of Culhwch and Olwen. | Sims-Williams, Patrick | Article in Book | | 1989 |
| The Irish language in county Offaly | Williams, Nicholas | Article in Book | | 1998 |
| The Irish literary tradition | Caerwyn Williams, J. E.Ford, Patrick K. | Monograph or Collective Volume | | 1992 |
| The Irish party system, 1938-51 | Murphy, John A. | Article in Book | | 1969 |
| The Irish plays of James Shirley, 1636-1640 | Williams, Justine Isabella | Thesis | | |
| The Irish question in British politics (1916-1922) | Mowat, Charles Loch, 1911- | Article in Book | | 1968 |
| The Irish Republican Brotherhood | Williams, T. Desmond | Article in Book | | 1973 |
| The Irish Struggle 1916-1926 | | Monograph or Collective Volume | Routledge & Kegan Paul | 1968 |
| The Irish tour, 1800-50 | Williams, William H. A. | Article in Book | | 2012 |
| The Kehoes of Williamstown. A femily's ancestry in the context of local and national historic events | Kehoe, Patrick | Article in Journal | | 2013 |
| The King's Irishmen : the Irish in the exiled court of Charles II, 1649-1660 | Williams, Mark R. F. | Monograph or Collective Volume | Boydell | 2014 |
| The King's Irishmen : the roles, impact and experiences of the Irish in the exiled court of Charles II, 1649-60 | Williams, Mark | Thesis | | |
| The kingdom of the air : the progress of meteorology | McWilliams, Brendan | Article in Book | | 1997 |
| The later Orange Order | McClelland, Aiken | Article in Book | | 1973 |
| The Latin Fraciscan Anglo-Irish annals of medieval Ireland | Williams, Bernadette | Thesis | | 1992 |
| The Leader, the Irish Press and the 1953-4 libel action over Professor T.D. Williams' 'A study in neutrality': 'the bloody borderland of contemporary history' | Kennedy, Michael (Michael J.) | Article in Book | NA | 2021 |
| The Legate Otto in Scotland and Ireland, 1237-40 | Williamson, D. M. | Article in Journal | | 1949 |
| The life and times of May Williams | Williams, Tom | Article in Journal | | 2005 |
| The location of the Celts according to Hecataeus, Herodotus, and other Greek writers | Sims-Williams, Patrick | Monograph or Collective Volume | | 2016 |
| The Lords of the Isles and Clan Donald and the early kingdom of the Scots | Williams, Ronald | Monograph or Collective Volume | | 1984 |
| The loss of the Maggie Williams | Forde, Frank | Article in Journal | | 1994 |
| The lost coronation oath of Edward I : rediscovered in a Dublin manuscript | Williams, Bernadette | Article in Book | | 2009 |
| The lost Swiss cottage of Woodstock, its architect and its illustrator | Williams, Jeremy | Article in Journal | | 1999 |
| The MacDonaghs | Williams, Roche | Article in Journal | | 1985 |
| The medieval and early modern cult of St. Brendan | Wooding, Jonathan M. | Article in Book | | 2009 |
| The medieval world of Robin Flower | Sims-Williams, Patrick | Article in Book | | 1998 |
| The monastery of Mount St. Joseph Clondalkin | Williams, Joe | Monograph or Collective Volume | South Dublin Libraries | 2010 |
| The Mountmellick Canal | Williams, Mary Ann | Monograph or Collective Volume | Laois County Council | 2008 |
| The muster roll of county Downe, continued | Williams, Margaret | Article in Journal | | 1990 |
| The new I.R.A., 1925-62 | Murphy, John A. | Article in Book | | 1973 |
| The New University of Ulster | Williamson, Arthur P. | Article in Book | | 2009 |
| The Ordnance Survey memoir of Ireland : origins, progress and decline | McWilliams, Patrick | Thesis | | |
| The organisation and administration of relief, 1845-52 | O'Neill, Thomas Patrick | Article in Book | | 1956 |
| The organisation and administration of relief, 1845-52 | O'Neill, Thomas Patrick | Article in Book | | 1994 |
| The origins of the Irish mental hospital service, 1800-35 | Williamson, Arthur Peebles | Thesis | | 1971 |
| The origins of the Irish rising of 1916 | Martin, F. X. (Francis Xavier), 1922-2000 | Article in Book | | 1968 |
| The papacy and episcopal appointments in Ireland, 1305-34 | Williams, Patrick | Thesis | | 1961 |
| The passing of the Irish parliamentary party (1916-1918) | Lyons, F. S. L. (Francis Stewart Leland) | Article in Book | | 1968 |
| The poems of Giolla Brighde Mac Con Midhe | | Monograph or Collective Volume | | 1980 |
| The political background | Nowlan, Kevin B. | Article in Book | | 1956 |
| The political background | Nowlan, Kevin B. | Article in Book | | 1994 |
| The Pope's children : Ireland's new elite | McWilliams, David | Monograph or Collective Volume | Gill & Macmillan | 2005 |
| The prose works of Jonathan Swift, 1 : A Tale of a Tub, with other early works, 1696-1707; 2 : Bickerstaff papers and pamphlets on the church; 3 : The Examiner, and other pieces written in 1710-11; 4 : A Proposal for Correcting the English Tongue, Polite Conversation etc.; 5 : Miscellaneous and autobiographical pieces, fragments and marginalia; 6 : Political tracts, 1711-1713; 7 : The history of the four last years of the Queen; introd. by H. Williams; 8 : Political tracts, 1713-19; 9 : Irish tracts, 1720-3, and sermons. Introductory essay and notes on the sermons by Louis Landa; 10 : The Drapier's letters and other works, 1724-5; 11 : Gulliver's Travels, 1726, with and introduction by Harold Williams; 12 : Irish tracts, 1728-1733; 13 : Directions to servants and miscellaneous pieces, 1733-1742; 14 : Index. Addenda, errata, corrigenda. 14 vols. | Davis, HerbertEhrenpreis, IrvinHollander, StevenKunz, W. J.Landa, Louis A., 1901-Staves, SusanSwift, Jonathan, 1667-1745 | Monograph or Collective Volume | | 1939 |
| The regicides in Ireland, 1 : Daniel Axtell, governor of Kilkenny; 2 : John Cooke and the 'high court of justice'; 3 : The sales of the Irish to the plantations | Williams, Joseph Batterson [i.e. Muddiman, Joseph George] | Article in Journal | | 1914 |
| The Renvyle letters : Gogarty family correspondence, 1939-1957 | | Monograph or Collective Volume | Daletta | 2000 |
| The Ribbonmen | Lee, J.J. (John Joseph), 1942- | Article in Book | | 1973 |
| The rigger : operating with the SAS | Williams, Jack | Monograph or Collective Volume | Cooper | 2001 |
| The rise and fall of the Paraguayan Republic, 1800-1870 | Williams, John Hoyt | Monograph or Collective Volume | Institute of Latin American Studies, University of Texas at Austin | 1979 |
| The Risorgimento in retrospect : an Irish historian's view | Williams, T. Desmond | Article in Book | | 1960 |
| The Rock of the Irishmen : an early place-name tale from Fife and Kinross | Taylor, Simon, 1950- | Article in Book | | 2007 |
| The Scotch-Irish in Pennsylvania | Williams, E. Melvin | Article in Journal | | 1923 |
| The Sir Richard Wallace Trust, (Lisburn) | McWilliams, Anthea | Article in Journal | | 2006 |
| The social life of books : Reading together in the Eighteenth-Century home | Williams, Abigail | Monograph or Collective Volume | Yale University Press | 2017 |
| The social revolution that never was | Lynch, Patrick, 1917-2001 | Article in Book | | 1968 |
| The sociolinguistic context of Welsh | Jones, Robert OwenWilliams, Colin H. | Article in Book | | 2010 |
| The sorcery trial of Alice Kyteler | Williams, Bernadette | Article in Journal | | 1994 |
| The sources for medieval Anglo-Irish history | Brooks, E. St. J. | Article in Book | | 1958 |
| The submission of Irish kings in fact and fiction : Henry II, Bendigeidfran, and the dating of The Four Branches of the Mabinogi | Sims-Williams, Patrick | Article in Journal | | 1991 |
| The summing-up | Williams, T. Desmond | Article in Book | | 1968 |
| The sunken gold : First World War espionage and the greatest treasure salvage in history | Williams, Joseph A. | Monograph | History Press | 2018 |
| The treaty negotiations | Pakenham, Francis Aungier, 7th earl of Longford, 1905-2001 | Article in Book | | 1968 |
| The truth concerning Cromwell's massacre at Drogheda | Williams, Joseph Batterson [i.e. Muddiman, Joseph George] | Article in Journal | | 1910 |
| The Ulster army of the Confederate Catholics, 1642-49 | Williams, Andrew | Article in Journal | | 2011 |
| The United Irishmen | McCracken, J. L. | Article in Book | | 1973 |
| The University of Ulster : genesis & growth | | Monograph or Collective Volume | Four Courts | 2009 |
| The untouchables : Ireland's Criminal Assets Bureau and its war on organised crime | Williams, Paul | Monograph or Collective Volume | Merlin | 2006 |
| The Volunteer Evening Post and patriotic print culture in late eighteenth-century Ireland | Powell, Martyn J. | Article in Book | | 2010 |
| The Welsh Cistercians and Ireland | Williams, David H. (David Henry), 1933- | Article in Journal | | 1980 |
| The Whig supremacy, 1714-1760 | Williams, Arthur Frederic Basil, 1867-1950 | Monograph or Collective Volume | Clarendon Press | 1939 |
| The Whiteboys | Wall, Maureen (née Mac Geehin) | Article in Book | | 1973 |
| The Williams Group Tullamore: making the transition in the 1960s from a family concern to one of the largest private companies in Ireland, | Byrne, Michael | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| The years of readjustment, 1945-51 | Lyons, F. S. L. (Francis Stewart Leland) | Article in Book | | 1969 |
| The ‘unforgivable’? : Irish Republican Army (IRA) informers and dealing with Northern Ireland conflict legacy, 1969-2021 | Leah Williams, Eleanor ; Leahy, Thomas | Article in Journal | | 2023 |
| Theatre, sexuality and the state: Tennessee Williams's The Rose Tottoo at the Dublin Theatre Festival, 1957 | Pilkington, Lionel | Article in Book | | 2008 |
| Third report of the Royal Commission on Historical Manuscripts, with appendix and index. [C. 673] | Royal Commission on Historical Manuscripts | Monograph or Collective Volume | | 1872 |
| Thomas David Sinnott (1893-1965) : patriot, poet, orator, historian, Irish speaker, writer, intellectual, Wexford's first County Manager | Williams, Tom | Article in Journal | | 2010 |
| Thomas Wilson, Francis Hutchinson and Litriu na Gaeilge | Williams, N. J. A. | Article in Journal | | 1986 |
| Thought, word, and deed : an Irish triad | Sims-Williams, Patrick | Article in Journal | | 1978 |
| Thoughts on a great character | McWilliams, Brendan | Article in Journal | | 2000 |
| Three Irish glossaries. Cormac's Glossary, Codex A, (from a manuscript in the library of the Royal Irish Academy), O'Davoren's Glossary (from a manuscript in the library of the British Museum), and a glossary to the Calendar of Oingus the Culdee (from a manuscript in the Library of Trinity College, Dublin) | | Monograph or Collective Volume | Williams and Norgate | 1862 |
| Three officers of the Royal Tyrone Fusiliers | Williams, J. R. | Article in Journal | | 1997 |
| Through the prism of ethnic violence : riots and racial attacks in Wales, 1826-2002 | Evans, Neil | Article in Book | | 2003 |
| Tipperary convicts and Tasmania | Williams, John | Article in Journal | | 1989 |
| Tory Island, county Donegal | Williams, Howard | Article in Journal | | 1952 |
| Tourism, landscape, and the Irish character : British travel writers in pre-famine Ireland | Williams, William Henry Allen | Monograph or Collective Volume | University of Wisconsin Press|Eurospan [distributor] | 2008 |
| Town and city maps of the British Isles, 1800-1855 | Baynton-Williams, Ashley | Monograph or Collective Volume | | 1992 |
| Townlands : a recurrent theme in the ordnance survey memoirs of Ireland | McWilliams, Patrick | Article in Book | | 1991 |
| Trade tokens issued in the 17th century in England, Wales and Ireland, by corporations, merchants, tradesmen, etc. | Boyne, WilliamWilliamson, George Charles | Monograph or Collective Volume | Seaby | 1967 |
| Translating the Jansenist controversy in Britain and Ireland | Williams, Mark R. F. | Article in Journal | | 2019 |
| Triads and other enumerative proverbs from south Ulster | Williams, Fionnuala | Article in Journal | | 1988 |
| Tullamore D. E. W. Distillery | Byrne, Michael | Article in Journal | | 2015 |
| Two local families intertwined in 1798 | Williams, Tom | Article in Book | | 1998 |
| Ulster during the war and after | Kennedy, David | Article in Book | | 1969 |
| Viking camps and the means of exchange in Britain and Ireland in the ninth century | Williams, Gareth | Article in Book | | 2015 |
| Viking camps in England and Ireland | Williams, Gareth | Article in Book | | 2014 |
| Vikings : life and legend | | Monograph or Collective Volume | The British Museum Press | 2014 |
| Villa splendido | Williams, Jeremy | Article in Journal | | 2004 |
| Violence and the social services in Northern Ireland | | Monograph or Collective Volume | Heinemann Educational | 1978 |
| Water mills on the river Sow. Part 1-2 | Devine, Alice | Article in Journal | | 2004 |
| Wexford GAA bible (1887-2020) : a complete statistical record of club and county activities in hurling, football, camogie and ladies football | Williams, Dominic | Monograph or Collective Volume | Independently published - Dominic Williams | 2021 |
| When Williamsburg and Greenpoint were Irish | Ridge, John T. | Article in Journal | | 1996 |
| Whence the 'black Irish' of Jamaica? | Williams, J. J. | Monograph or Collective Volume | | 1932 |
| Who are the southern mountaineers? | Williams, Cratis | Article in Journal | | 1972 |
| William Atkins, 1812-1887 : a forgotten Cork pre-Raphaelite | Williams, Jeremy | Article in Book | | 1992 |
| William Bedell: piúratánach, easpag, aistritheoir | Williams, N. J. A. | Article in Book | | 1990 |
| Women and political activism in Northern Ireland, 1960-93 | | Article in Book | | 2002 |
| Women on a mission | Lucey, John | Article in Journal | | 2018 |
| Writing and publishing histories in eighteenth-century Ireland | Barnard, T. C. (Toby Christopher) | Article in Book | | 2010 |
| Yards and feet | Williamson, Jim | Article in Journal | | 2001 |
| Yeats' MacNeice | Walker, Tom | Article in Book | | 2010 |
| ‘Device for the reformation of Ireland’, c. 1585 | Williams, Thomas (?) | Article in Book | | 2016 |
| ‘The moving spirit’: Traversing Mary Ann McCracken’s Belfast | McWilliams, Cathryn | Article in Book | | 2022 |
| ’An account obtained from authentic documents’: Jane Williams (Ysgafell) as a historian | Roberts, Gwyneth Tyson | Article in Book | | 2013 |