| Jonson | B | 174 | Corporal | Frontier Wars. SAGS (1) 1877-8 | Grahamstown Volunteers |
| Jonson | C | | Private / Trooper | Frontier Wars. SAGS (1) 1878. Medal returned | Fort Beaufort Burghers |
| Jonson | C G | 20 | Private | Source: Nominal roll in WO127 | Willowmore TG |
| Jonson | E | | Private | CGHGSM (1) Bechuanaland
Source: Roll of the CGHGSM | First City Volunteers |
| Jonson | E J | | | Source: QSA and KSA rolls | British South Africa Police |
| Jonson | G T | | | Source: WO100/284 | Port Elizabeth TG |
| Jonson | Gottfrid | 1705 and 381 | Trooper | Served in 1st KFS. Joined Cape Town 12 Sep 01 Pretoria 8 Aug 02 disbandment
Source: Nominal roll in WO127 | Kitchener's Fighting Scouts |
| Jonson | H B | | | 1st Battalion
Source: WO100/281 | Grahamstown TG |
| Jonson | J | 381 | Private | Demise: Killed in action 18 Feb 1901
Place: Hartbeesfontein
Source: In Memoriam by S Watt | Victoria, 4th Imperial Contingent |
| Jonson | Jephthah | 381 | Private | Source: OZ-Boer database | Victoria, 4th Imperial Contingent |
| Jonson | Johan | | | Volunteer from Russia (Jewish) serving with the Boer forces
Source: Anglo Boer War Museum database, August 2016 | Russian volunteers |
| Jonson | Johan | | | Prisoner number: 12563
Captured: Port Elizabeth 19 Sep 1900
Sent to: Unknown
Age: 26
Address: Kerkstraat
Source: Anglo Boer War Museum 2016 | Boer Forces |
| Jonson | Johannes | | | Prisoner number: 17923
Captured: Ventersdorp 24 Mar 1901
Sent to: India
Age: 18
Address: Potchefstroom
Source: Anglo Boer War Museum 2016 | Boer Forces |
| Jonson | John William | | Orderly | Source: Nominal roll in WO127 | Imperial Hospital Corps |
| Jonson | O | | Private | Natal 1906 (1)
Source: Recipients of the Natal 1906 Medal | Natal Medical Corps |
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