| Name | Role | Place | Source | |
|---|---|---|---|---|
| Johannes Petrus van Westerop | Groom | 1869 | 's-Gravenhage | Civil registration marriages |
| Johannes Petrus van Westerop | Witness | 1866 | 's-Gravenhage | Civil registration marriages |
| Johannes Petrus van Westerop | Witness | 1873 | 's-Gravenhage | Civil registration marriages |
| Petrus Johannes van Westerop | Groom | 1887 | Alkmaar | Civil registration marriages |
| Petrus Johannes van Westerop | Father of groom | 1922 | Schagen | Civil registration marriages |
| Petrus Johannes van Westerop | Father of groom | 1924 | Alkmaar | Civil registration marriages |
| Petrus Johannes van Westerop | Father of bride | 1915 | Alkmaar | Civil registration marriages |
| Petrus Johannes van Westerop | Father of groom | 1926 | Alkmaar | Civil registration marriages |
| Petrus Johannes van Westerop | Father of groom | 1931 | Amsterdam | Civil registration marriages |
| Petrus Johannes van Westerop | Father of groom | 1933 | Broek op Langedijk | Civil registration marriages |
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