| Surname | Initials | Rank | Army No. | ||
|---|---|---|---|---|---|
| O'Reilly | T | Private | 5385089 | ||
| O'Riley | M | Sergeant | 2545 | ||
| O'Rourke | J P | Staff Sergeant | 24663974 | ||
| O'Rourke | S F | Warrant Officer II | 24677756 | ||
| O'Rourke | S M | Staff Sergeant | 25026294 | ||
| O'Rourke | D | Private | 6349454 | ||
| O'Rourke | P J | Sergeant | 6468118 | ||
| O'Rourke | P | Sergeant | 317199 | ||
| O'Ryan | P J F | Lieutenant | 454837 | ||
| O'Shaughnessy | J | Sergeant | P/6436 |