| Name | Role | Place | Source | |
|---|---|---|---|---|
| Wilhelm Fligerius ( Willem de Vliger ), mede-erfgenaam van Beertgen Gerrits van Leuwen | Constituant | 1662 | Notarial records | |
| Wilhelm van Leuwen | Groom | 1939 | Nijmegen | Civil registration marriages |
| Wilhelm van Leuwen | Registered | 1902 | Amsterdam | Militia records |
| Wilhelm van Leuwen | Tewerkgestelde | 's-Gravenhage | Workforce registration | |
| Wilhelm van Leuwen | Tewerkgestelde | 's-Gravenhage, Rotterdam | Workforce registration | |
| Wilhelm van Leuwen | Tewerkgestelde | 's-Gravenhage | Workforce registration | |
| Wilhelm van Leuwen | Tewerkgestelde | 's-Gravenhage, Wyk | Workforce registration | |
| Wilhelm van Leuwen | Tewerkgestelde | 's-Gravenhage, Wyk | Workforce registration | |
| Wilhelm van Leuwen | Deceased | 1993 | Boxmeer, Friemersheim | Prayer card collection |
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