| Oconor | J | | | Source: QSA and KSA rolls | British South Africa Police |
| Oconor | M | | | 1st Battalion
Source: Medal rolls | Prince of Wales's Leinster Regiment (Royal Canadia |
| Ocorne | E | | | 3rd battalion
Source: QSA and KSA medal rolls | Grenadier Guards |
| Ocral | J | 3581 | Private | 2nd Battalion
Demise: Died of disease 20 Feb 1900
Place: Orange River Station
Source: In Memoriam by S Watt | Black Watch (Royal Highlanders) |
| Octavia | | | Sister | BSACM Matabeleland 1893 (0). Medals for Matabeleland were issued to the Reverend Mother Jacoba and the eight Nursing Nuns under her. Of these nine medals, all but two are accounted for in the Dominican convents at Johannesburg and King William's Town. The medal to Sister Octavia is the only one known in a private collection, the whereabouts of that to Sister Mechtild remain a mystery. BSACM reverse Matabeleland 1893 (Sister Octavia). DNW December 1991 £960.
Source: BSACM rolls | Bechuanaland Border Police |
| Octhinzen | W | | | Source: WO100/283 | Maraisburg TG |
| October | P P | 30113 | Trooper | Killed in action. Witkopjes, 15 April 1901
Source: South African Field Force Casualty Roll | Prince of Wales Light Horse |
| October | P P | 30113 | Trooper | Demise: Killed in action 15 Apr 1901
Place: Witkopjes
Source: In Memoriam by S Watt | Prince of Wales Light Horse |
| October | Peter P | 30113 | Trooper | Source: Nominal roll in WO127 | Prince of Wales Light Horse |
| October | W | 688 | Private | Missing in action. Holpan, 29 January 1902
Shot by Boers
Source: South African Field Force Casualty Roll | Border Scouts |
| October | W | 688 | Private | Demise: Murdered 29 Jan 1902
Place: Holpan
Source: In Memoriam by S Watt | Border Scouts |
| October | Willem | | | Source: Attestation paper in WO126 | Border Scouts |
| October | William | 393 | Trooper | Source: Nominal roll in WO127 | Bushmanland Borderers |
| October | William | | | Source: Attestation paper in WO126 | Bushmanland Borderers |
| Odam | M R | | | 2nd Battalion, Volunteer Service Battalion
Source: QSA and KSA medal rolls | Northamptonshire Regiment |
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