| Orman | W | 7071 | Private | Died of disease. Kroonstad, 28 December 1900
3rd Battalion.
Source: South African Field Force Casualty Roll |
| Ormond | W | 7071 | Private | 3rd Battalion
Demise: Died of disease 28 Dec 1900
Place: Kroonstad
Source: In Memoriam by S Watt |
| Oswalds | C | | | 2nd Battalion
Source: QSA and KSA medal rolls |
| Otterson | W | | | 2nd Battalion
Source: QSA and KSA medal rolls |
| Ottoway | W | 11/2385 | Private | Frontier Wars. SAGS (1) 1879 |
| Ousey | A | | | 2nd Battalion
Source: QSA and KSA medal rolls |
| Owen | J | | | 2nd Battalion
Source: QSA and KSA medal rolls |
| Owen | R | 11/3055 | Private | Frontier Wars. SAGS (1) 1879 |
| Owen | W | | | 2nd Battalion
Source: QSA and KSA medal rolls |
| Owens | J | 11/2588 | Private | Frontier Wars. SAGS (1) 1879 |
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