| Martin | Robert | 9463 | Trooper | Source: Nominal roll in WO127 |
| Mason | Robert | 23427 | Trooper | Source: Nominal roll in WO127 |
| Masoon | John Pulteney | 3077 | Trooper | Source: Nominal roll in WO127 |
| Massoam | Ernest William | 3271 | Trooper | Source: Nominal roll in WO127 |
| Masson | J P | 3077 | Trooper | Wounded. Paardeberg, 18 February 1900
Source: South African Field Force Casualty Roll |
| Masterton | J H | 4119 | Trooper | Wounded. Boschfontein, 4 September 1900
Source: South African Field Force Casualty Roll |
| Matfield | Henry Francis | 3220 | Trooper | Source: Nominal roll in WO127 |
| Mathers | T | | Trooper | Missing in action. Nooitgedacht, 13 December 1900
Rejoined
Source: South African Field Force Casualty Roll |
| Mathers | Thomas J | 23593 | Trooper | Source: Nominal roll in WO127 |
| Mathieson | Isaac Harper | 4119 | Sergeant | Source: Nominal roll in WO127 |
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