| Name | Role | Place | Source | |
|---|---|---|---|---|
| Johannes Cornelis Wilhelmus van Leeuwen | Registered | 1899 | Alkemade | Population register |
| Johannes Cornelis Wilhelmus van Leeuwen | Father | 1937 | Leiden | |
| Johannes Cornelis Wilhelmus van Leeuwen | Deceased | 1969 | Leiden | |
| Johannes Cornelis Wilhelmus van Leeuwen | Child | 1899 | Alkemade | |
| Johannes Wilhelmus Cornelis van Leeuwen | Deceased | 1872 | 's-Gravenhage | Civil registration deaths |
| Wilhelmus Johannes Cornelis van Leeuwen | Registered | 1922 | Population register | |
| Wilhelmus Johannes Cornelis van Leeuwen | Registered | 1913 | Voorburg | Population register |
| Wilhelmus Johannes Cornelis van Leeuwen | Registered | 1913 | Voorburg | Population register |
| Wilhelmus Johannes Cornelis van Leeuwen | Groom | 1940 | Voorburg | Civil registration marriages |
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