| Clark | William Henry | | Trooper | Discharged 4 Nov 1899 Drunkeness
Source: Nominal roll in WO127 | Rimington's Guides |
| Clark | William James | 41024 | Trooper | No known Company. Served in 39th Btn IY
Source: QSA Medal Rolls | Imperial Yeomanry |
| Clark | William Jno | 620 | Trooper | Source: Nominal roll in WO127 | SAMIF |
| Clark | William Middleton | 163 | Trooper | Served in 1st KFS. Joined Durban 15 Jan 01 transferred 29 Apr 01 2KFS
Source: Nominal roll in WO127 | Kitchener's Fighting Scouts |
| Clark | William Middleton | 0 | Trooper | Served in 2nd KFS. Joined transferred from 1KFS 30 Apr 01
Source: Nominal roll in WO127 | Kitchener's Fighting Scouts |
| Clark | William Ralph | 35 | QMS | Source: Nominal roll in WO127 | Imperial Yeomanry Scouts |
| Clark | William Ralph | | Private | QSA (2)
Source: List of QSAs with the clasp Defence of Kimberley | Kimberley TG |
| Clark | William Ralph | 421 | Trooper | Source: Nominal roll in WO127 | Kimberley Horse |
| Clark | William Richard | 22074 | Private | Source: QSA Medal Rolls | 20th Company, 6th Btn, IY |
| Clark | William Richard | 44774 | Private | Source: QSA Medal Rolls | 128th Company, 28th Btn, IY |
| Clark | William Walter B | | Trooper | Source: Nominal roll in WO127 | Gorringe's Flying Column |
| Clark | Wm Delaney | | | Source: Medal rolls | Canada, Royal Canadian Artillery |
| Clark(e) | William | 50 | Private | NGRRA, QSA (1) DoL. Resident Magistrate. Served 12 - 22 Dec 99 | Ladysmith TG |
| Clark-Kennedy | John William James | | Lieutenant | Source: QSA Medal Rolls | 8th Company, 4th Btn, IY |
| Clark-Kennedy | William Hew | 13088 | Trooper | Source: QSA Medal Rolls | 51st Company, 12th Btn, IY |
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