Family Group Sheet| FATHER | | Wytze Kaastra | | BIRTH | 13 August 1865 | Goutum | | FATHER | Tjerk Wytzes Kaastra | | MOTHER | Antje Pieters Sandra | | | | MOTHER | | Trijntje Fokkema | | BIRTH | 7 October 1863 | Menaldum | | FATHER | Theunis Fokkes Fokkema | | MOTHER | Aaltje Gerhardus de Cock |
| | | CHILDREN | | 1. | Tjerk Kaastra MALE | | | BIRTH | 12 January 1894 | Tietjerk |
| | 2. | Teunis Kaastra MALE | | | BIRTH | 6 February 1896 | Tietjerk |
| | 3. | Pieter Kaastra MALE | | | BIRTH | 30 May 1898 | Tietjerk |
| | 4. | Aaltje Kaastra FEMALE | | | BIRTH | 3 October 1899 | Tietjerk | | BIRTH | 3 October 1899 | | | MARRIAGE | | Sjoerd Bokma; |
| | 5. | Anne Kaastra MALE | | | BIRTH | 14 May 1902 | Tietjerk |
| | 6. | Neeltje Kaastra FEMALE | | | BIRTH | 18 October 1903 | Tietjerk |
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