Family Group Sheet| FATHER | | Gerben Holkema | | BIRTH | 3 February 1950 | Sneek | | REF # | | 129; | | FATHER | Johannes Holkema | | MOTHER | Luitje Posthumus | | | | MOTHER | | Wieske Hiemstra | | REF # | | 135; |
| | | CHILDREN | | 1. | Sonja Holkema FEMALE | | | BIRTH | 9 November 1973 | IJlst | | REF # | | 136; |
| | 2. | Marcel Holkema MALE | | | BIRTH | 4 February 1978 | IJlst | | REF # | | 137; |
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