| Cook | J | 6508 | Private | 3rd Volunteer Active Service Company
Source: QSA roll | Loyal North Lancashire Regiment |
| Cook | J | 7500 | Private | 1st Battalion
Source: QSA roll | Loyal North Lancashire Regiment |
| Cook | J | | | Source: WO100/252 | Imperial Military Railways |
| Cook | J | | | 2nd Battalion
Source: QSA and KSA medal rolls | (King's Own) Yorkshire Light Infantry |
| Cook | J | 651 | Trooper | List of medals returned from Cape Town
Source: QSA medal roll in WO100/246 | Colonial Light Horse |
| Cook | J | 4375 | Private | Demise: Died of wounds 20 Apr 1901
Place: Edenburg Near Vaalkop + Sprftn
Source: In Memoriam by S Watt | 9th (The Queen's Royal) Lancers |
| Cook | J | 573 | Trooper | List of medals returned from Cape Town
Source: QSA medal roll in WO100/246 | Colonial Light Horse |
| Cook | J | | | 4th Battalion
Source: QSA and KSA medal rolls | King's Royal Rifle Corps |
| Cook | J | | | Source: QSA and KSA medal rolls | King's Royal Rifle Corps |
| Cook | J | | | 2nd Battalion
Source: QSA and KSA medal rolls | (King's Own) Royal Lancaster Regiment |
| Cook | J | | | 3rd Battalion
Source: QSA and KSA medal rolls | Lincolnshire Regiment |
| Cook | J | 4375 | Private | Dangerously wounded. Vaalkop, ORC, 17 April 1901
Died 20 April
Source: South African Field Force Casualty Roll | 9th (The Queen's Royal) Lancers |
| Cook | J | T/12380 | Driver | Died of disease. Naauwpoort, 14 April 1900
5th Company
Source: South African Field Force Casualty Roll | Army Service Corps |
| Cook | J | 2654 | Sapper | To Provisional Company 5 Feb 1902. Invalided.
QSA (5) TH OFS RoL Tr LN. KSA
TNA ref 157/86; 314/76 | Royal Engineers, Field Company, 37th |
| Cook | J | 3644 | Private | Prisoner. Nooitgedacht, 13 December 1900
2nd Battalion. Released 15 December
Source: South African Field Force Casualty Roll | Northumberland Fusiliers |
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