| Name | Role | Place | Source | |
|---|---|---|---|---|
| Johannes Cornelis Hendricus Ruijgrok | Registered | 1913 | 's-Gravenhage | Population register |
| Johannes Cornelis Hendricus Ruijgrok | Groom | 1931 | Amsterdam | Civil registration marriages |
| Johannes Cornelis Hendricus Ruijgrok | Child | 1901 | Delft | Civil registration births |
| Johannes Cornelis Hendricus Ruijgrok | Registered | 1845 | Zaandam, Delft | Population register |
| Johannes Cornelis Hendricus Ruijgrok | Registered | 1900 | Delft | Population register |
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