Family Group Sheet| FATHER | | Yke Johannes Zwart | | BIRTH | 1811 | Elahuizen | | DEATH | 1855 | Doniawerstal | | REF # | | 26772; | | FATHER | Johannes Klazes de Zwart | | MOTHER | Antje Piebes Bosma | | | | MOTHER | | Grietje Jentjes Tromp | | BIRTH | 1814 | | | DEATH | 1868 | | | REF # | | 26771; | | FATHER | Jentje Feitzes Tromp | | MOTHER | Margjen Sjerps Troelstra |
| | | CHILDREN | | 1. | Sjerp Ykes Zwart MALE | | | BIRTH | 8 November 1833 | Wymbitseradeel | | DEATH | 18 November 1848 | Tjerkgaast |
| | 2. | Rudolphus Ykes Zwart MALE | | | BIRTH | 29 March 1835 | Wymbritseradeel |
| | 3. | Johannes Ykes Zwart MALE | | | BIRTH | 17 April 1836 | Wymbritseradeel |
| | 4. | Jentje Ykes Zwart MALE | | | BIRTH | 10 December 1837 | Wymbritseradeel |
| | 5. | Antje Ykes Swart FEMALE | | | BIRTH | 17 March 1840 | Tjerkgaast |
| | 6. | Margjen Ykes Zwart FEMALE | | | BIRTH | 4 February 1842 | Doniawerstal | | DEATH | 5 November 1842 | Lemmer |
| | 7. | Feitze Ykes Zwart MALE | | | BIRTH | 29 September 1843 | Doniawerstal |
| | 8. | Martien Ykes Swart MALE | | | BIRTH | 1846 | Doniawerstal | | BIRTH | 1846 | | | DEATH | 1899 | | | REF # | | 26775; | | MARRIAGE | 9 May 1869 | Berber Hylkes Tromp; Doniawerstal |
| | 9. | Margje Ykes Zwart FEMALE | | | BIRTH | 26 December 1848 | Tjerkgaast |
|
