| O'Donovan | P | | | Source: QSA and KSA medal rolls |
| O'Donovan | P | | | Source: QSA and KSA medal rolls |
| O'Grady | J E | | | Source: QSA and KSA medal rolls |
| O'Neill | Jihl | | | Source: QSA and KSA medal rolls |
| Oates | T | | | Source: QSA and KSA medal rolls |
| Oates | T | | | Source: QSA and KSA medal rolls |
| Obrien | J | | | Source: QSA and KSA medal rolls |
| Odgers | W | | | Source: QSA and KSA medal rolls |
| Okes | J | | | Source: QSA and KSA medal rolls |
| Oliphant Junior | B A | | | Source: QSA and KSA medal rolls |
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