| | Name | Given Name | Initials | Regiment | Unit | Cemetery | Country | Locality | Date of Death |
 |  | MACKINTOSH | DONALD | D | Mounted Commandos, S.A. Forces | Cullinan's Horse | WINDHOEK OLD MUNICIPAL CEMETERY | Namibia | | 1916-01-21 |
| | | MANSFIELD | WILLIAM FREDERICK ETHELRED | W F E | Mounted Commandos, S.A. Forces | Brand's Commando | WINBURG CEMETERY | South Africa | Free State | 1914-11-12 |
| | | MAPHAM | GEORGE WILLIAM | G W | Mounted Commandos, S.A. Forces | Geyser's Commando | POLOKWANE (OR PIETERSBURG) CEMETERY | South Africa | Limpopo Province | 1914-12-05 |
| | | MARAIS | KLAAS CLOUDIE | K C | Mounted Commandos, S.A. Forces | Cradock Commando | SCHUITDRIFT FARM BURIAL GROUND, POFADDER | South Africa | Northern Cape | 1914-12-21 |
| | | MARE | WILLIAM | W | Mounted Commandos, S.A. Forces | De La Rey's Commando | PRETORIA (REBECCA STREET) CEMETERY | South Africa | Gauteng | 1914-12-16 |
| | | MASSON | JAMES CHRISTIE | J C | Mounted Commandos, S.A. Forces | Cullinan's Horse | KIMBERLEY (WEST END) CEMETERY | South Africa | Northern Cape | 1915-01-12 |
| | | MEY | JAN ADAM | J A | Mounted Commandos, S.A. Forces | Ermelo Commando | LILIEBURN FARM BURIAL GROUND, WARBURTON | South Africa | Mpumalanga | 1915-03-20 |
| | | MEYER | FREDERIK WILLEM | F W | Mounted Commandos, S.A. Forces | Potchefstroom Commando | POTCHEFSTROOM CEMETERY | South Africa | North West Province | 1915-03-20 |
| | | MEYER | HENDRIK CHRISTOFFEL | H C | Mounted Commandos, S.A. Forces | Brand's Horse | BLOEMFONTEIN (IN MEMORIAM) CEMETERY | South Africa | Free State | 1915-02-16 |
| | | MILLER | | S | Mounted Commandos, S.A. Forces | Geyser's Commando | THABA TSHWANE (OLD No.1) MILITARY CEMETERY | South Africa | Gauteng | 1914-12-05 |