| Name | Role | Place | Source | |
|---|---|---|---|---|
| J. A. Loopuijt | Registered | 1845 | Pieters Bierum | Population register |
| J. Loopuijt | Person in notarial deed | 1794 | Zierikzee | Notarial records |
| J. Loopuijt | Registered | 1811 | Amsterdam | Notarial records |
| J. Loopuijt | Mention | Schiedam | Correspondence | |
| J. Loopuijt | Registered | 1802 | Amsterdam | Notarial records |
| J. Loopuijt | Belanghebbende | 1808 | Notarial records |
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