| Name | Role | Place | Source | |
|---|---|---|---|---|
| Henry Wilhem Ferdinand van Leeuwen | Widower | 1981 | Geleen | Prayer card collection |
| Wilhem Henderickx van Leeuwen | Witness | 1743 | Leiden | |
| Wilhem Hendriksz van Leeuwen | Father | 1703 | Leiden | |
| Wilhem van Leeuwen | Relation | 1712 | Delft | Church records burials |
| Wilhem van Leeuwen | Father | 1716 | Tholen | Church records baptisms |
| Wilhem van Leeuwen | Groom | 1714 | Tholen | Church records marriages |
| Wilhem van Leeuwen | Witness | 1748 | Leiden | |
| Wilhem van Leeuwen | Witness | 1690 | Leiderdorp |
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