| Koster | A E | | | 3rd battalion
Source: QSA and KSA medal rolls | Grenadier Guards |
| Koster | Albertus Johan | | Burger | Commando: General Muller. Click here to access the record in the Forum | Boer Forces |
| Koster | Cornelis | | | Prisoner number: 11730
Captured: Harrismith
Sent to: Ceylon, Diyatalawa
Age: 34
Address: Harrismith
Source: Anglo Boer War Museum 2016 | Unknown |
| Koster | Elias Arnoldus Petrus | | | Prisoner number: 21112
Captured: Vaalsvlei 04 Jul 1901
Sent to: Bermuda
Age: 33
Address: Beguisel
Source: Anglo Boer War Museum 2016 | Boer Forces |
| Koster | F W | | Luitenant | Source: Roll of DTD recipients | Boer Forces |
| Koster | Fred W | | | Prisoner number: 3950
Captured: Elandslaagte 29 Nov 1899
Sent to: Unknown
Age: 29
Address: Johannesburg
Source: Anglo Boer War Museum 2016 | Unknown |
| Koster | Frederick Wilhelm | | | Volunteer from Germany serving with the Boer forces
Source: Anglo Boer War Museum database, August 2016 | German volunteers |
| Koster | Frederick Wiliam | | Lt | Commando: Duitser Corps. Awarded the DTD (Dekoratie voor Trouwe Dienst) and received the Wound Ribbon (Lint voor Verwonding). Click here to access the record in the Forum | Boer Forces |
| Koster | G | | Private | Natal 1906 (1)
Source: Recipients of the Natal 1906 Medal | Lower Tugela Division Militia Reserves |
| Koster | J | | Corporal | Natal 1906 (1)
Source: Recipients of the Natal 1906 Medal | Natal Mounted Rifles |
| Koster | J | 124 | Trooper | Served 29 Sep 99 to 31 May 02.
Source: Nominal roll in WO127 | Natal Mounted Rifles |
| Koster | J | 124 | Trooper | QSA (3)
Source: List of QSAs with the clasp Elandslaagte | Natal Mounted Rifles |
| Koster | J | 124 | Trooper | QSA (3) Eland DoL SA01
Provisional list of recipients
Source: Ladysmith Siege Account and Medal Roll | Natal Mounted Rifles |
| Koster | Jan | | | Prisoner number: 17098
Captured: Johannesburg 14 Feb 1901
Sent to: Unknown
Age: 36
Address: Johannesburg
Source: Anglo Boer War Museum 2016 | Boer Forces |
| Koster | Johannes Andries | | | Prisoner number: 13877
Captured: Harrismith
Sent to: Unknown
Age: 28
Address: Blaufort
Source: Anglo Boer War Museum 2016 | Unknown |
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