| Name | Role | Place | Source | |
|---|---|---|---|---|
| Casper Johannes Koop | Child | 1837 | Stad Almelo | Civil registration births |
| Casper Koop | Deceased | 1834 | Stad Almelo | Civil registration deaths |
| Casper Koop | Child | 1834 | Stad Almelo | Civil registration births |
| Emil Casper Anton Maria Julius Koop | Registered | 1883 | Winterswijk | Notarial records |
| Emil Casper Anton Maria Julius Koop | Registered | 1883 | Winterswijk | Notarial records |
| Erven Casper Joseph Heijtemeijer echtgenoot Catharina Koop | Seller | 1797 | Amsterdam | Waivers |
| Erven Casper Joseph Heijtemeijer echtgenoot Catharina Koop | Seller | 1797 | Amsterdam | Waivers |
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