| A wedding, a family feud, a long costly lawsuit - and tragedy. Transcribed from the 'Belfast Telegraph', Monday 4 November 1940 | Lawlor, H. C. (Henry Cairnes), 1870-1943 | Article in Journal | | 2000 |
| Breaking the Mauser rifle : the O'Hara and Crawley families and Ireland's journey to nationhood | O'Hara, Gerald | Monograph or Collective Volume | Old Clan Publishing | 2021 |
| History, antiquities, and present state of the parishes of Ballysadare and Kilvarnet, in the county of Sligo: with notices of the O'Haras, the Coopers, the Percevals, and other local families | O'Rourke, T. | Monograph or Collective Volume | James Duffy and Sons | c. 1870 |
| O'Hara of Craigbilly, Oaklands also | Kenny, James G. | Article in Journal | | 1994 |
| Prairie farmers from the Foreglen | Farren, Aidan | Article in Journal | | 2011 |
| The Ballyheigue affray of 1869 | MacMahon, Bryan, 1949- | Article in Journal | | 2012 |
| The O'Hara family connection with St Clerans | Henry, William | Monograph or Collective Volume | Merv Griffin | 1999 |
| The O'Hara MS | Greene, David | Article in Journal | | 1942 |
| The O'Haras of Annaghmore c.1600-c.1800 : survival and revival | Bartlett, Thomas | Article in Journal | | 1982 |
| The O'Haras of Annaghmore c.1600-c1800 : survival and revival | Bartlett, Thomas | Article in Book | | 2024 |