Family Group Sheet| FATHER | | Egbert van der Kooi | | REF # | | 8809; | | | | MOTHER | | Albertje Roels Hettema | | BIRTH | 28 May 1858 | Berlikum | | DEATH | 17 March 1937 | Oosterend | | REF # | | 8676; | | MARRIAGE | 17 May 1884 | Willem Geerts Nauta; Hennaarderadeel | | FATHER | Roelof Walles Hettema | | MOTHER | Wietske Ages Feitsma |
| | | CHILDREN | | 1. | Anna van der Kooi FEMALE | | | REF # | | 8812; |
| | 2. | Wytske van der Kooi FEMALE | | | BIRTH | 23 September 1899 | Hennaarderadeel | | REF # | | 8810; |
| | 3. | Jan van der Kooi MALE | | | BIRTH | 23 February 1901 | Hennaarderadeel | | REF # | | 8811; |
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