| Silbert | P | | Private | QSA (1)
Source: List of QSAs with the clasp Defence of Kimberley | Kimberley TG |
| Siljeur | A | | Private | QSA (1)
Source: List of QSAs with the clasp Defence of Kimberley | Kimberley TG |
| Sillwood | Ernest J | 3625 | Gunner | QSA known to exist. QSA (3)
Source: List of QSAs with the clasp Defence of Kimberley | Royal Garrison Artillery |
| Silson | R | | Private | QSA known to exist. QSA (1)
Source: List of QSAs with the clasp Defence of Kimberley | Kimberley TG |
| Simkins | P | | Private | QSA (1)
Source: List of QSAs with the clasp Defence of Kimberley | Kimberley TG |
| Simmons | M | | Private | QSA (1)
Source: List of QSAs with the clasp Defence of Kimberley | Kimberley TG |
| Simon | J | | Private | QSA (1)
Source: List of QSAs with the clasp Defence of Kimberley | Kimberley TG |
| Simpkiss | Henry Stoner | 234 | Trooper | QSA known to exist. QSA (2)
Source: List of QSAs with the clasp Defence of Kimberley | Kimberley Light Horse |
| Simpson | C J | | Mr | QSA (1)
Source: List of QSAs with the clasp Defence of Kimberley | Army Post Office Corps |
| Simpson | F D | 1378 | L Corporal | QSA known to exist. QSA (4)
Source: List of QSAs with the clasp Defence of Kimberley | Cape Police |
| Simpson | G | 1092 | Trooper | QSA (3)
Source: List of QSAs with the clasp Defence of Kimberley | Kimberley Light Horse |
| Simpson | H | | Private | QSA (1)
Source: List of QSAs with the clasp Defence of Kimberley | Kimberley TG |
| Simpson | J | | Private | QSA known to exist. QSA (1)
Source: List of QSAs with the clasp Defence of Kimberley | Kimberley TG |
| Simpson | T T | | Mr | QSA known to exist. QSA (1)
Source: List of QSAs with the clasp Defence of Kimberley | Army Post Office Corps |
| Sinclair | D K | | Lieutenant | QSA known to exist. QSA (1)
Source: List of QSAs with the clasp Defence of Kimberley | Kimberley TG |
| Sinclair | H M L | | Private | QSA (1)
Source: List of QSAs with the clasp Defence of Kimberley | Kimberley TG |
| Sinclair | John | | Private | QSA (3)
Source: List of QSAs with the clasp Defence of Kimberley | Kimberley TG |
| Sivertson | L | 226 | Trooper | QSA (2)
Source: List of QSAs with the clasp Defence of Kimberley | Kimberley Light Horse |
| Skelding | R A | | Private | QSA (1)
Source: List of QSAs with the clasp Defence of Kimberley | Kimberley TG |
| Skeldon | J | | Private | QSA (1)
Source: List of QSAs with the clasp Defence of Kimberley | Kimberley TG |
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