| Name | Role | Place | Source | |
|---|---|---|---|---|
| Ruurd Hendriks Posthuma | Buyer | 1888 | Tietjerksteradeel | Notarial records |
| Ruurd Hendriks Posthuma | Seller | 1890 | Tietjerksteradeel | Notarial records |
| Ruurd Hendriks Posthuma | Mention | 1894 | Dantumadeel, Suawoude | Notarial records |
| Ruurd Hendriks Posthuma | Debtor | 1888 | Dantumadeel | Notarial records |
| Ruurd Hendriks Posthuma | Registered | 1859 | Oudega | Population register |
| Ruurd Hendriks Posthuma | Registered | 1859 | Oudega Sm | Population register |
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