| Sullivan | Thomas | 38147 | Trooper | Source: Nominal roll in WO127 |
| Summerfield | George | 9671 | Trooper | Source: Nominal roll in WO127 |
| Sutton | Alfred | 640 | Trooper | Source: Nominal roll in WO127 |
| Sutton | Fred | | Private | Source: Nominal roll in WO127 |
| Sweeting | Walter George | | Private | Source: Nominal roll in WO127 |
| Sweetland | Benjamin David | | Lieutenant | Source: Nominal roll in WO127 |
| Swift | Frank William | | Lieutenant | Source: Nominal roll in WO127 |
| Synott | F | | Sergeant | Demise: Died 21 May 1901
Place: Mandesfontein?
Source: In Memoriam by S Watt |
| Tanner | Albert | 4194 | Trooper | Source: Nominal roll in WO127 |
| Tarpey | M | | Lieutenant | Source: Nominal roll in WO127 |
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