Family Group Sheet| FATHER | | Johannes Jarigs Sierkstra | | | | MOTHER | | Taetske Laurens Posthuma |
| | | CHILDREN | | 1. | Riemke Johannes Sierkstra FEMALE | | | BIRTH | 1868 | Witmarsum | | DEATH | 30 November 1912 | Bolsward | | MARRIAGE | 18 May 1890 | Klaas Sybrens Altena; Bolsward | | MARRIAGE | 16 May 1897 | Jacob Langedijk; Bolsward |
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