| A writer's Wicklow | Mansfield, Jagoda de Valera | Article in Journal | | 2001 |
| Annals of Cluain Mhic Nóis : 'Annals of Clonmacnoise' | | Monograph or Collective Volume | Edmund Burke Publisher | 2022 |
| Bangor Bay and harbour : a pictorial history | Jaggers, AndrewWilson, Ian | Monograph or Collective Volume | North Down Borough Council | 2002 |
| Comment peut-on être arabe? Regards des voyageurs sur les nations levantines | Jager, Patrick | Article in Book | | 1995 |
| Gladstone and Ireland | Boyce, David George, 1942- | Article in Book | | 1998 |
| Hair all curling gold : an account of my youth and early manhood | Hayden, Jago | Monograph or Collective Volume | Black Lion Books | 2000 |
| Irland | Jäger, Helmut | Monograph or Collective Volume | Wissenschaftliche Buchgesellschaft | 1990 |
| Kings over overkings : propaganda for pre-eminence in early medieval Ireland | Jaski, Bart | Article in Book | | 1997 |
| Land use in medieval Ireland : a review of the documentary evidence | Jäger, H. | Article in Journal | | 1983 |
| Land- und Forstwirtschaftliche Bodennutzung im mittelalterlichen Irland | Jäger, Helmut | Article in Journal | | 1979 |
| Land-und Fortwirtschaftliche Bodennutzung im mittelalterlichen Irland | Jäger, H. | Article in Journal | | 1979 |
| Medieval landscape terms of Ireland : the evidence of Latin and English documents | Jäger, Helmut | Article in Book | | 1988 |
| Michael Davitt and John Davitt Jageurs (1895-1916) | O'Neill, Pamela | Article in Journal | | 2007 |
| Records and recollections : a history of the Diocesan Secondary School for Girls, 1849-1974 | Jagoe, Muriel | Monograph or Collective Volume | The author | 1986 |
| Records of the four Tipperary septs : the O'Kennedys, O'Dwyers, O'Mulryans, O'Meaghers | Callanan, Martin | Monograph or Collective Volume | Jag | 1995 |
| Some Irish 18th century editions of Shakespeare, not recorded by Jaggard, Stockwell or Ford | O'Hegarty, P. S. | Article in Journal | | 1952 |
| St Patrick's Purgatory | Jaggard, William | Article in Journal | | 1942 |
| ‘Mahomedan Fenians’ : anti-imperialism, the Islamic world and Irish republican thought, c.1848–1885 | Lally, Jagjeet | Article in Journal | | 2021 |