| Name | Role | Place | Source | |
|---|---|---|---|---|
| Ruurd Jacobs Kalweyer | Registered | 1805 | Heeg | Population register |
| Ruurd Kalweyer | Buyer | 1857 | Workum | Notarial records |
| Ruurd Kalweyer | Mention | 1885 | Workum | Kohieren hoofdelijke omslag |
| Ruurd Kalweyer | Mention | Workum | Kohieren hoofdelijke omslag | |
| Ruurd Kalweyer | Relation | 1858 | Workum | Civil registration deaths |
| Ruurd Kalweyer | Registered | 1805 | Heeg | Population register |
| Ruurd Kalweyer | Father | 1897 | Bolsward | Prayer card collection |
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