O
- Christine Frances O'Brian
- Christine O'Brien
- Nelson O'Brien
- Peter O'Brien
- Terry O'Brien
- Barry O'Carroll
- Mat O'Connell
- Barry O'Connor
- Jan O'Connor
- Mark O'Connor
- Michael O'Connor
- Phil O'Connor
- Simon O'Connor
- Steve O'Connor
- Terry O'Connor
- Tom O'Connor
- Pat O'Dea
- Jim O'Dowd
- Henare O'Keefe
