| Surname | Initials | Rank | Army No. | ||
|---|---|---|---|---|---|
| O'Leary | E | Lance Corporal | P/13905 | ||
| O'Leary | C E | Private | 4466014 | ||
| O'Leary | P | Private | 13016230 | ||
| O'Leary | E M P | Officer Cadet | 552640 | ||
| O'Loghlen | P | Sergeant | 901 | ||
| O'Looney | E | Private | 6843363 | ||
| O'Mahoney | W | Lance Corporal | 6409975 | ||
| O'Mahony | W | Private | 6409975 | ||
| O'Malley | J C | Lance Corporal | P/6995 | ||
| O'Malley | G | Lance Corporal | P/7210 |