| Name | Role | Place | Source | |
|---|---|---|---|---|
| Freerk Freerks Posthuma | Deceased | 1837 | Anjum | Death duties files |
| Freerk Freerks Posthuma | Relation | 1877 | Engwierum | Civil registration deaths |
| Freerk Freerks Posthuma | Deceased | 1837 | Anjum | Civil registration deaths |
| Freerk Freerks Posthuma | Father | 1852 | Oostdongeradeel | Civil registration births |
| Freerk Freerks Posthuma Landmeter Landmeter | Child | 1856 | Opsterland | Civil registration births |
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