| Surname | Initials | Rank | Army No. | ||
|---|---|---|---|---|---|
| O'Byrne | B T | Lance Corporal | 14337364 | ||
| O'Callaghan | C T | Colonel | 11737 | ||
| O'Callaghan | J | Lance Corporal | P/16698 | ||
| O'Callaghan | T | Lance Corporal | P/14202 | ||
| O'Callaghan | S | Sergeant | 25133523 | ||
| O'Callaghan | J | Lance Corporal | 5617980 | ||
| O'Callaghen | R D | Lance Corporal | 2657205 | ||
| O'Callanghan | H | Corporal | 18293 | ||
| O'Connel | P | Lance Corporal | P/15410 | ||
| O'Connell | J M | Corporal | 3959430 |