| Oosthuizen | J A | | | District 2
Source: QSA and KSA rolls |
| Oosthuizen | Johannes | 1935 | | Attested: Jun 1906. Source: CMP 42 |
| Oosthuizen | John | 142 | Private | QSA (5)
Source: List of QSAs with the clasp Defence of Kimberley |
| Oosthuizen | Piet | | Constable | Attested: Mar 1905. Source: CMP 42 |
| Oostingh | Hermanus | 1267 | | Attested: Mar 1902. Source: CMP 42 |
| Opemshaw | F | | Private | CGHGSM (1) Bechuanaland
Source: Roll of the CGHGSM |
| Oppenheim | Albert | 2041 | | Attested: Oct 1899. Source: CMP 42 |
| Opperman | Gysbert | 2324 | | Attested: Dec 1912. Source: CMP 42 |
| Opperman | John | 1202 | | Attested: Oct 1896. Source: CMP 42 |
| Opperman | Rudolph | | Constable | Attested: Feb 1905. Source: CMP 42 |
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