| Name | Role | Place | Source | |
|---|---|---|---|---|
| Jacob Bergwerff | Father of groom | 1845 | Naaldwijk | Civil registration marriages |
| Jacob Bergwerff | Child | 1898 | Rozenburg | Civil registration births |
| Jacob Bergwerff | Father | 1829 | Dinther | Civil registration deaths |
| Jacob Bergwerff | Registered | 1875 | Hellevoetsluis | Population register |
| Jacob Bergwerff | Father | 1882 | Rotterdam | Civil registration deaths |
| Jacob Bergwerff | Registered | 1880 | Zwartewaal | Population register |
| Jacob Bergwerff | Father | 1909 | Delft | Civil registration deaths |
| Jacob Bergwerff | Father | 1882 | Rotterdam | Civil registration deaths |
| Jacob Cornelisz Bergwerff | Registered | 1841 | Stompwijk | Notarial records |
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