| Sullivan | John | | Trooper | Source: Nominal roll in WO127 |
| Summers | Robert Herbert | 288 | Trooper | Source: Nominal roll in WO127 |
| Sutton | | 270 | Saddler | Source: Nominal roll in WO127 |
| Swainback | Christopher | 61 | Trooper | Source: Nominal roll in WO127 |
| Swift | Herbert | 31 | Trooper | Source: Nominal roll in WO127 |
| Swinburne | U P | | Lieutenant | Source: Nominal roll in WO127 |
| Tarleton | J H | 317 | Trooper | Prisoner. Near Mafeking, 31 March 1900
Released
Source: South African Field Force Casualty Roll |
| Tarleton | Johnathan Hill | 317 | Trooper | Source: Nominal roll in WO127 |
| Tarr | Henry Melverton | 328 | Trooper | Source: Nominal roll in WO127 |
| Tarr | Holling Munroe | 316 | Trooper | Source: Nominal roll in WO127 |
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