| | |
| Rachael Oakenfull | (2 publications) |
| Arthur Oakley | (35 publications) |
| Dr Fiona Oakley | (63 publications) |
| Crispian Oates | (13 publications) |
| Leslie Oates | (2 publications) |
| David Oatway | (1 publications) |
| Dr Graeme O'Boyle | (21 publications) |
| Colm O'Brien | (3 publications) |
| David O'Brien | (4 publications) |
| Professor John O'Brien | (380 publications) |
| Kirsty O'Brien | (1 publications) |
| Ottilia O'Brien | (1 publications) |
| Peter O'Brien | (12 publications) |
| Professor Sean O'Brien | (30 publications) |
| Professor Stephen O'Brien | (63 publications) |
| Dr Patrick O'Callaghan | (23 publications) |
| Dr Patricia Ocampo-Thomason | (1 publications) |
| Emma O'Connell | (3 publications) |
| Dr Janice O'Connell | (38 publications) |
| Professor Enda O'Connell | (60 publications) |
