| Name | Role | Place | Source | |
|---|---|---|---|---|
| Adriana Maria Knappen | Mother | 1901 | Delft | Civil registration deaths |
| Maria Knappen | Mother of bride | 1902 | Brussel | Civil registration marriages |
| Maria Knappen | Wife | 1960 | Sint Odiliënberg | Prayer card collection |
| Maria Madeleine Knappen | Mother | 1818 | Geertruidenberg | Civil registration deaths |
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