| Name | Role | Place | Source | |
|---|---|---|---|---|
| August Collen | Witness | 1902 | Scherpenheuvel | Civil registration marriages |
| August Collen | Witness | 1904 | Scherpenheuvel | Civil registration marriages |
| August Collen | Witness | 1923 | Tienen | Civil registration marriages |
| August Leopold Collen | Groom | 1904 | Scherpenheuvel | Civil registration marriages |
| Jozef August Collen | Registered | Antwerpen | Foreigners register |
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