| Name | Role | Place | Source | |
|---|---|---|---|---|
| Martinus Gilbertus Keyen | Witness | 1829 | Brussel | Civil registration marriages |
| Martinus Keyen | Father | 1865 | Maastricht | Civil registration deaths |
| Martinus Keyen | Father of bride | 1839 | Ottenburg | Civil registration marriages |
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