| Name | Role | Place | Source | |
|---|---|---|---|---|
| Jan Klaasse van Leeuwen | Mention | 1848 | Bodegraven | Notarial records |
| Jan Klaasse van Leeuwen | Deceased | 1742 | Woubrugge | |
| Jan Klaasse van Leeuwen | Declarant | 1855 | 's-Gravenhage | Civil registration deaths |
| Jan Klaasse van Leeuwen | Father | 1855 | 's-Gravenhage | Civil registration deaths |
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