| 'Goeth over onely to obtaine breeding': William O'Neylon's certificate of passage to Spain | McInerney, Luke | Article in Journal | | 2018 |
| A garden is a lovesome thing | O'Brien, Grania R. | Article in Journal | | 1996 |
| A poem on the adventures abroad and death of Donnchadh son of Brian Bóraimhe | Ní Urdail, Meidhbhín | Article in Journal | | 2012 |
| An identification of the names of the Christian king-list of O’Brien’s Corpus Genealogiarum Hiberniae, volume I; and an assessment of the list’s value for Irish history | Mac Mhuiris, Seán | Article in Journal | | 1995 |
| An inventory of the contents of Bunratty Castle and the will of Henry, fifth Earl of Thomond, 1639 | Ó Dálaigh, Brian | Article in Journal | | 1995 |
| An O'Brien family in France | O'Brien, P. I. D. | Article in Journal | | 1991 |
| Ballyalla and the Clare embroidery class | Rowe, Veronica | Article in Journal | | 2005 |
| Bunratty Castle : a short history | Lynch, Christopher | Article in Journal | | 1977 |
| Castlefergus, or Ballyhannon Castle - a living stronghold | Breen, MartinUa Cróinín, Risteárd | Article in Journal | | 2014 |
| Chain migration from Ireland to Australia: a case study from the slopes and foothills of the Galtees | O'Brien, Eileen M. | Article in Journal | | 2019 |
| Dál Cais - church and dynasty | Ó Corráin, Donnchadh | Article in Journal | | 1973 |
| Disputed kinship among the Jacobite O'Briens in eighteenth-century France | Corp, Edward T. | Article in Journal | | 2018 |
| Doctors Donnell and James Neylond and the O'Briens of Thomond 1530-1599 | Ó Dálaigh, Brian | Article in Journal | | 1991 |
| Entries in a family diary | Byrne, Declan | Article in Journal | | 1998 |
| From Gaelic warlords to English country gentlemen, the O'Briens of Thomond, 1543-1741 | Ó Dálaigh, Brian | Article in Journal | | 2001 |
| Historical and literary representations of Brian Boru's burial in Armagh, 1014 AD | Casey, Denis | Article in Journal | | 2010 |
| Historical memoir of the O'Briens | O'Donoghue, John | Monograph or Collective Volume | Martin Breen | 2002 |
| History of the name O'Brien | Williams, James | Monograph or Collective Volume | Mercier Press | 1978 |
| History of the O'Briens from Brian Boroimhe, A.D. 1000 to A.D. 1946 | O'Brien, Donough | Monograph or Collective Volume | Batsford | 1949 |
| Jellett, O'Brien, Purser and Stokes : seven generations, four families | Purser, Michael | Monograph or Collective Volume | Prejmer Verlay | 2004 |
| Kings and vassals in later medieval Ireland : the Uí Bhriain and the MicConmara in the fourteenth century | Nic Ghiollamhaith, Aoife | Article in Book | | 1995 |
| Leamanch : an O'Brien castle and manor house | Gosling, PaulO'Connell, Jeffrey | Article in Book | | 1991 |
| Looking over my shoulder : life for an O’Brien family from the townland of Carrownakilly in 19th-century Ireland | O’Brien, Patrick M., 1953- | Monograph or Collective Volume | [The author] | 2014 |
| Lucius and Catherine O'Brien of Corofin | MacMahon, Michael | Article in Journal | | 2001 |
| Magh Adhair, inauguration place of the kings of Thomond | Ryan, Martin | Article in Journal | | 1977 |
| Mount Ievers, or Ballyarilla Castle | Breen, MartinUa Cróinín, Risteárd | Article in Journal | | 2017 |
| Mountcashel tower house and its colourful inhabitants throughout history | O'Brien, John | Article in Journal | | 1978 |
| New documents on the disputed kinship among the Jacobite O'Briens in eighteenth-century France | Corp, Edward
| Article in Journal | | 2022 |
| Notes. The Thomond Tomb of St Mary's Cathedral reconsidered | Harris, Amy LouiseÓ Dáleigh, Brian | Article in Journal | | 2017 |
| O'Brien : people and places | Weir, Hugh W. L. | Monograph or Collective Volume | Ballina Press | 2002 |
| O'Brien of Thomond : the O'Briens in Irish history 1500-1865 | O'Brien, Ivar | Monograph or Collective Volume | Phillimore | 1986 |
| O'Brien people and places | Weir, Hugh W. L. | Monograph or Collective Volume | Ballinakella | 1983 |
| O'Brien's Bridge in the reign of Henry VIII | Hodkinson, Brian J. | Article in Book | | 2012 |
| Observations on the text known as the Leabhar Oiris | Ní Úrdail, Meidhbhín | Article in Book | | 2013 |
| Prayer, penance and the Passion of Christ : the iconographic programme of the Franciscan friary at Ennis, Ireland | Krasnodebska-D’Aughton, Malgorzata | Article in Journal | | 2016 |
| Some matters touching Dromoland : letters of father and son, 1758-9 | McNamara, Leo | Article in Journal | | 1986 |
| Some observations on the 'Dublin Annals of Inisfallen' | Ní Úrdail, Meidhbhín | Article in Journal | | 2007 |
| Some Thomond 'Escapees' - the survival of a volume of Thomond Manuscripts, recently located and returned to Ireland from the USA [with index] | Breen, Martin | Article in Journal | | 2024 |
| Some towerhouses of East Corca Bhaiscinn and the Shannon Estuary [Parts I-II] | Breen, MartinUa Cróinín, Risteárd | Article in Journal | | 2013 |
| The Brien Castletown estate in the nineteenth century: possibilities for research | McHugh, Frank | Article in Journal | | 2017 |
| The Briens of Brawney, otherwise Uí Braoin Breaghmhaine | Cox, Liam, 1908-2003 | Article in Journal | | 1980 |
| The Cratloe O'Briens | O'Brien, P. I. D. | Article in Journal | | 1980 |
| The Earls of Thomond and their burial monuments, 1543-1741 | Ó Dálaigh, Brian | Article in Journal | | 2016 |
| The early castles at Dromoland: Some historical notes | Breen, MartinUa Cróinín, Ristéard | Article in Journal | | 2019 |
| The family register of the O'Briens of Newcastle, Ballyporeen, county Tipperary | Clare, Wallace | Article in Journal | | 1953 |
| The family silver : a memoir of depression and inheritance | O'Brien, Sharon | Monograph or Collective Volume | Chicago University Press | 2004 |
| The history of the O'Brien and Leddin families | O'Brien, James V. | Article in Journal | | 1988 |
| The Inchiquin collection: a new perspective on an ancient Clare family | Berry, Róisín | Article in Journal | | 2006 |
| The Kildare plate and O'Brien of Thomond | Ó Dálaigh, Brian | Article in Journal | | 2003 |
| The O'Brien family | O'Brien, Donough | Article in Journal | | 1939 |
| The O'Briens and MacMahons of Thomond, their patronage of the Franciscan Order, and their burial monuments | Ó Dálaigh, Brian | Article in Journal | | 2017 |
| The O'Briens in Munster after Clontarf | Ryan, John | Article in Journal | | 1942 |
| The O'Briens of Dough and Ennistymon | O'Brien, P. I. D. | Article in Journal | | 1984 |
| The O'Briens of Dromore Castle | O'Brien, Ivor | Article in Journal | | 1987 |
| The O'Briens of Fairfield, Co. Galway, the O'Brien relations of Florimond, Comte de Basteret | Casteleyn, Mary | Article in Journal | | 2004 |
| The O'Hickeys, hereditary physicians to the O'Briens of Thomond and some of their descendants | Hickey, J. | Article in Journal | | 1958 |
| The Resurgence of Gaelic Power in Ireland and Scotland and its wider impact, c.1350-1513 | Egan, Simon P. | Thesis | | 2016 |
| The rise of the Dál Cais | Kelleher, J. V. | Article in Book | | 1967 |
| The royal O'Briens : a tribute | O'Brien Clan Association | Monograph or Collective Volume | O'Brien Clan Association | 1992 |
| The story of the O'Briens of Bandon and their descendants, 1875-2013 | Hyland, Áine | Monograph or Collective Volume | The author | 2013 |
| The Uí Briain kingship in Telach Óc | Hogan, James | Article in Book | | 1995 |
| These my friends and forebears : the O'Briens of Dromoland | O'Brien, G. R. (Grania Rachel), 1928- | Monograph or Collective Volume | Ballinakella | 1991 |
| Three remarkable families | Fullam, Paddy | Article in Journal | | 1983 |
| Timothy O'Brien, an early Irish immigrant | O'Brien, Michael J. | Article in Journal | | 1926 |
| Uí Bhraoin na Dufaine | de Vál, Seamus S. | Article in Journal | | 2004 |
| William O'Brien agus a chlann | Mitchell, L. M. | Article in Journal | | 1958 |
| William of Windsor and the wars of Thomond | Harbison, Sheelagh | Article in Journal | | 1989 |