| Name | Role | Place | Source | |
|---|---|---|---|---|
| Carl Rudolph van Leeuwen | Registered | Delft | Population register | |
| Carl Rudolph van Leeuwen | Registered | Delft | Population register | |
| Carl Rudolph van Leeuwen | Registered | 1872 | Amsterdam | Overgenomen delen |
| George Louis Rudolph van Leeuwen | Registered | 's-Gravenhage | Roll of honor | |
| Rudolph Hermanus Theodorus van Leeuwen | Deceased | 1931 | Leiden | |
| Rudolph van Leeuwen | Father of groom | 1947 | Leiden |
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