| Name | Role | Place | Source | |
|---|---|---|---|---|
| Sandertje Posthuma | Mother | 1856 | Leeuwarden | Civil registration deaths |
| Sandertje Sanders Posthuma | Mother | 1800 | Haskerland | Church records baptisms |
| Sandertje Sanders Posthuma | Registered | 1792 | Amsterdam | Notarial records |
| Sandertje Sanders Posthuma | Mother of bride | 1822 | Dantumadeel | Civil registration marriages |
| Sandertje Sanders Posthuma | Mother of bride | 1849 | Dantumadeel | Civil registration marriages |
| Sandertje Sanders Posthuma | Mother | 1888 | Dantumadeel | Civil registration deaths |
| Sandertje Sanderts Posthuma | Mother of groom | 1839 | Leeuwarden | Civil registration marriages |
| Sandertje Sannes Posthuma | Mention | 1816 | Leeuwarden | Notarial records |
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