| Name | Role | Place | Source | |
|---|---|---|---|---|
| Cornelis Petrus Antonius Ruijgrok | Registered | 1922 | Rotterdam | Population register |
| Cornelis Petrus Antonius Ruijgrok | Registered | 1922 | Rotterdam | Population register |
| Cornelis Petrus Ruijgrok | Groom | 1947 | Leiden, Wassenaar | |
| Jacobus Cornelis Petrus Ruijgrok | Registered | 1922 | Rotterdam | Population register |
| Johannes Petrus Cornelis Ruijgrok | Registered | Delft | Family cards | |
| Petrus Cornelis Ruijgrok | Registered | 1913 | 's-Gravenhage | Population register |
| Petrus Cornelis Ruijgrok | Registered | 1918 | 's-Gravenhage | Population register |
| Petrus Cornelis Ruijgrok | Registered | 1913 | 's-Gravenhage | Population register |
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