| Oates | J A | | | 1st Battalion
Source: QSA and KSA rolls |
| Oates | James Alfred | 2745 and 367 | Trooper | 1st Battalion
Source: Nominal roll in WO127 |
| Ober | G M | 15997 | Trooper , 79th IY | 1st Battalion
Source: Nominal roll in WO127 |
| Obrien | James | | | 2nd Battalion
Source: QSA and KSA rolls |
| Obrien | M H | | | 2nd Battalion
Source: QSA and KSA rolls |
| Obrien | W C | | | 2nd Battalion
Source: QSA and KSA rolls |
| Obrien | W T | | | 2nd Battalion
Source: QSA and KSA rolls |
| Obrien | William Thos | | | 2nd Battalion
Source: QSA and KSA rolls |
| Ocgreal | M H | 157 | Tpr | Severely wounded at Colenso. 15 Dec 1899.
Source: Natal Field Force Casualty Roll, page 222 line 8 |
| Ochre | H C | | Tpr | Severely wounded at Elandslaagte. 21 Oct 1899.
Source: Natal Field Force Casualty Roll, page 221 line 20 |
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