| Clarke | John Dickson | 273 | | Source: Medal rolls | Canada, 2nd Canadian Mounted Rifles |
| Clarke | John George | | | Source: QSA and KSA medal rolls | 42nd Battery, RFA |
| Clarke | John Henry | 23229 | Trooper | Source: QSA Medal Rolls | 33rd Company, 11th Btn, IY |
| Clarke | John Henry | 21237 | Trooper | Source: QSA Medal Rolls | 69th Company, 7th Btn, IY |
| Clarke | John James | 2127 | Trooper | Source: OZ-Boer database | New South Wales, 3rd Contingent NSW Mounted Rifles |
| Clarke | John Richard | 6033 | Private | Source: QSA Medal Rolls | 39th Company, 10th Btn, IY |
| Clarke | John S | | | 1st Battalion
Source: QSA and KSA medal rolls | Scots Guards |
| Clarke | John Thomas | 28482 | Sergeant | Source: QSA Medal Rolls | 15th Company, 5th Btn, IY |
| Clarke | John Thomas | | | Source: QSA and KSA medal rolls | New Zealand, 9th Contingent |
| Clarke | John W | | Trooper | BSACM Rhodesia 1896 (0).
Source: BSACM rolls | Bulawayo Field Force |
| Clarke | John William | | | Source: WO100/280 | Bedford TG |
| Clarke | John William | 38875 | Trooper | Source: QSA Medal Rolls | 138th Company, 30th Btn, IY |
| Clarke | John William | | | 1st Battalion
Source: QSA and KSA rolls | Imperial Light Horse |
| Clarke | John William | 1758 | Trooper | 1st Battalion
Source: Nominal roll in WO127 | Imperial Light Horse |
| Clarke | John Wishart | 120 | Lance Sergeant | Source: OZ-Boer database | New South Wales, 3rd Contingent NSW Imperial Bushm |
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