| O'Brien | W | | Private | Natal 1906 (1)
Source: Recipients of the Natal 1906 Medal | Natal Rangers |
| O'Bryen | J G P | | Trooper | Natal 1906 (1)
Source: Recipients of the Natal 1906 Medal | Royston's Horse |
| O'Callaghan | D | | Trooper | Natal 1906 (1)
Source: Recipients of the Natal 1906 Medal | Royston's Horse |
| O'Connor | J | | Trooper | Natal 1906 (0)
Source: Recipients of the Natal 1906 Medal | Zululand Mounted Rifles |
| O'Connor | J V P | | Private | Natal 1906 (1)
Source: Recipients of the Natal 1906 Medal | Natal Rangers |
| O'Connor | P | | Trooper | Natal 1906 (1)
Source: Recipients of the Natal 1906 Medal | Natal Police |
| O'Donnell | G | | Private | Natal 1906 (1)
Source: Recipients of the Natal 1906 Medal | Natal Rangers |
| O'Donnell | T | | Farrier Sergeant | Natal 1906 (1)
Source: Recipients of the Natal 1906 Medal | Royston's Horse |
| O'Farrell | E J | | Trooper | Natal 1906 (1)
Source: Recipients of the Natal 1906 Medal | Royston's Horse |
| O'Hea | P W | | Trooper | Natal 1906 (1)
Source: Recipients of the Natal 1906 Medal | Transvaal Mounted Rifles |
| O'Keefe | P | | Lance Corporal | Natal 1906 (1)
Source: Recipients of the Natal 1906 Medal | Transvaal Mounted Rifles |
| O'Leary | T | | Trooper | Natal 1906 (1)
Source: Recipients of the Natal 1906 Medal | Natal Mounted Rifles |
| O'Mara | W H | | Trooper | Natal 1906 (0)
Source: Recipients of the Natal 1906 Medal | Umvoti Mounted Rifles |
| O'More | A | | Trooper | Natal 1906 (1)
Source: Recipients of the Natal 1906 Medal | Royston's Horse |
| O'Neil | H | | Trooper | Natal 1906 (0)
Source: Recipients of the Natal 1906 Medal | Newcastle Division Reserves |
| O'Neill | A E | | Gaoler | Natal 1906 (1)
Source: Recipients of the Natal 1906 Medal | Natal Police Gaolers |
| O'Neill | H | | Constable | Natal 1906 (1)
Source: Recipients of the Natal 1906 Medal | Natal Police |
| O'Neill | O A | | Captain | Natal 1906 (1)
Source: Recipients of the Natal 1906 Medal | Natal Veterinary Corps |
| O'Reilly | J E | | Trooper | Natal 1906 (1)
Source: Recipients of the Natal 1906 Medal | Transvaal Mounted Rifles |
| O'Reilly | J R | | Trooper | Natal 1906 (0)
Source: Recipients of the Natal 1906 Medal | Newcastle Division Reserves |
|
|
