| Janssen | Jan W | | Volunteer from Germany serving with the Boer forces
Source: Anglo Boer War Museum database, August 2016 | German volunteers |
| Janssen | Jan Willem | | Volunteer from Holland / Belgium serving with the Boer forces
Source: Anglo Boer War Museum database, August 2016 | Belgian and Dutch volunteers |
| Jaski | C J | | Volunteer from Holland / Belgium serving with the Boer forces
Source: Anglo Boer War Museum database, August 2016 | Belgian and Dutch volunteers |
| Jeandet | C | | Volunteer from France serving with the Boer forces
Source: Anglo Boer War Museum database, August 2016 | French volunteers |
| Jeilan | Friedrich | | Volunteer from Germany serving with the Boer forces
Source: Anglo Boer War Museum database, August 2016 | German volunteers |
| Jeltes | J | | Volunteer from Holland / Belgium serving with the Boer forces
Source: Anglo Boer War Museum database, August 2016 | Belgian and Dutch volunteers |
| Jereminiks | Paul | | Volunteer from Germany serving with the Boer forces
Source: Anglo Boer War Museum database, August 2016 | German volunteers |
| Jochem | J | | Volunteer from Holland / Belgium serving with the Boer forces
Source: Anglo Boer War Museum database, August 2016 | Belgian and Dutch volunteers |
| Johansson | Charles O | Sgt | WIA & POW 11/12/1899, escaped 19/03/1900
Volunteer from Sweden serving with the Boer forces
Source: Hjaltarna vid Magersfontein, Kapten H E Uddgren, Sweden, 1924 | Scandinavian volunteers |
| Johansson | Charles O | | Volunteer from Sweden serving with the Boer forces
Source: Anglo Boer War Museum database, August 2016 | Scandinavian volunteers |
| Johansson | David | | Volunteer from Sweden serving with the Boer forces
Source: Anglo Boer War Museum database, August 2016 | Scandinavian volunteers |
| Johansson | Jacob | | WIA 11/12/1899, POW 27/02/1900 died St Helena 11/09/00
Volunteer from Finland serving with the Boer forces
Source: Hjaltarna vid Magersfontein, Kapten H E Uddgren, Sweden, 1924 | Scandinavian volunteers |
| Johansson | Jacob | | Died St Helena 11/09/1900
Volunteer from Finland serving with the Boer forces
Source: Anglo Boer War Museum database, August 2016 | Scandinavian volunteers |
| Johansson | Per Erik | | POW 27/02/1900
Volunteer from Sweden serving with the Boer forces
Source: Hjaltarna vid Magersfontein, Kapten H E Uddgren, Sweden, 1924 | Scandinavian volunteers |
| Johansson | Per Erik | | Volunteer from Sweden serving with the Boer forces
Source: Anglo Boer War Museum database, August 2016 | Scandinavian volunteers |
| Johns | Carl | | Volunteer from Germany serving with the Boer forces
Source: Anglo Boer War Museum database, August 2016 | German volunteers |
| Johnson | Herman | | POW 27/02/1900
Volunteer from Finland serving with the Boer forces
Source: Hjaltarna vid Magersfontein, Kapten H E Uddgren, Sweden, 1924 | Scandinavian volunteers |
| Johnson | William | | Died Pretoria, 01/02/1901
Volunteer from America serving with the Boer forces
Source: Anglo Boer War Museum database, August 2016 | American volunteers |
| Johnsson | Erik | | POW 27/02/1900
Volunteer from Finland serving with the Boer forces
Source: Hjaltarna vid Magersfontein, Kapten H E Uddgren, Sweden, 1924 | Scandinavian volunteers |
| Johnsson | Erik | | Volunteer from Finland serving with the Boer forces
Source: Anglo Boer War Museum database, August 2016 | Scandinavian volunteers |
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