| Name | Role | Place | Source | |
|---|---|---|---|---|
| Maria Opkoper | Mother | 1837 | Boskoop | Civil registration births |
| Maria Opkoper | Mother | 1839 | Boskoop | Civil registration births |
| Maria Opkoper | Mother | 1904 | Gouda | Civil registration deaths |
| Maria Opkoper | Mother of bride | 1867 | Gouda | Civil registration marriages |
| Maria Opkoper | Mother of bride | 1874 | Gouda | Civil registration marriages |
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