| Oorthuyzen | J H | | | Source: QSA and KSA medal rolls | National Scouts |
| Oorthuyzen | M V | | | Source: QSA and KSA medal rolls | National Scouts |
| Oorthuyzen | P W | | | Source: QSA and KSA medal rolls | National Scouts |
| Oortman | Piet | 319 | Foot Scout | Source: Nominal roll in WO127 | Namaqualand Border Scouts |
| Ooschinzen | I W | | | Source: QSA and KSA medal rolls | Willowmore DMT |
| Ooschinzen | P H | | | Source: QSA and KSA medal rolls | Willowmore DMT |
| Oost | Harm | | Burger | Click here to access the record in the Forum | Pretoria Commando |
| Oost | Harm | | | Prisoner number: 1710
Captured: Kalkfontein 05 Apr 1900
Sent to: St. Helena
Age: 22
Address: Louis Trichardt
Source: Anglo Boer War Museum 2016 | Boer Forces |
| Oost | Harm | | | Volunteer from Holland / Belgium serving with the Boer forces
Source: Anglo Boer War Museum database, August 2016 | Belgian and Dutch volunteers |
| Oostehuisen | Jacobus Hendrik | | | Prisoner number: 16129
Captured: Corbansplyn 14 Dec 1900
Sent to: South Africa, Green Point
Age: 46
Address: Corbansplyn
Source: Anglo Boer War Museum 2016 | Boer Forces |
| Oostehuisen | Petrus Johannes | | | Prisoner number: 16127
Captured: Dewetsdorp 15 Dec 1900
Sent to: Bermuda
Age: 49
Address: Stolskraal
Source: Anglo Boer War Museum 2016 | Boer Forces |
| Oostehuisen | Stefanus Hendrick | | | Prisoner number: 16126
Captured: Daggafontein 17 Dec 1900
Sent to: Bermuda
Age: 54
Address: Daggafontein
Source: Anglo Boer War Museum 2016 | Boer Forces |
| Oostehuisen | Stefanus Hendrik | | | Prisoner number: 16128
Captured: Daggafontein 17 Dec 1900
Sent to: Unknown
Age: 16
Address: Daggafontein
Source: Anglo Boer War Museum 2016 | Boer Forces |
| Oostendorp | Anton | | | Volunteer from Germany serving with the Boer forces
Source: Anglo Boer War Museum database, August 2016 | German volunteers |
| Oostendorp | R | | | Volunteer from Germany serving with the Boer forces
Source: Anglo Boer War Museum database, August 2016 | German volunteers |
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