| O'Neill, Thomas Patrick, see also Ó Néill, TomásÓ Néill, Tomás, see also O'Neill, Thomas Patrick | Cross-reference | | |
| Agus 'an córas' ag an am | Ó Néill, Tomás | Article in Journal | | 1945 |
| De Valera. Imleabhar 2 | Ó Fiannachta, PádraigÓ Néill, Tomás | Monograph or Collective Volume | Cló Morainn | 1970 |
| Fiontán Ó Leathlobhair | Ó Néill, Tomás | Monograph or Collective Volume | Cló Morainn | 1962 |
| Ó Conaill agus and Ghaedhilg | Ó Néill, Tomás | Article in Journal | | 1944 |
| Political life : 1870-1921 | Ó Néill, Tomás | Article in Book | | 1970 |
| The scholar revolutionary, Eoin Mac Neill | Ó Néill, Tomás | Article in Journal | | 1975 |