| Name | Role | Place | Source | |
|---|---|---|---|---|
| Koenraad van Leeuwen | Partner | 1817 | Schiedam | Civil registration deaths |
| Koenraad van Leeuwen | Deceased | 1818 | Schiedam | Civil registration deaths |
| Koenraad van Leeuwen | Father | 1875 | Opijnen | Civil registration deaths |
| Koenraad van Leeuwen | Father | 1859 | Gouda | Civil registration deaths |
| Koenraad van Leeuwen | Deceased | 1818 | Schiedam | Civil registration deaths |
| Koenraad van Leeuwen | Partner | 1817 | Schiedam | Civil registration deaths |
| Koenraad van Leeuwen | Father of groom | 1894 | Vreeland | Civil registration marriages |
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