Family Group Sheet| FATHER | | Jan Hanzes Koyker | | BIRTH | 1761 | | | DEATH | 1828 | | | FATHER | Hans Wopkes Kooiker | | MOTHER | Grietje Jans | | | | MOTHER | | Sibbeltje Frankes Hornstra | | BIRTH | 1760 | Doniawerstal | | DEATH | 19 December 1821 | Ouwsterhaule | | FATHER | Franke Minnes Hornstra | | MOTHER | Sibbeltje Foppes |
| | | CHILDREN | | 1. | Hans Jans Koiker MALE | | | BIRTH | 1792 | Wyckel | | MARRIAGE | 15 May 1814 | Akke Joostes van der Hoek; Haskerland |
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