Family Group Sheet| FATHER | | Claas Douwes | | REF # | | 21743; | | | | MOTHER | | Trijntie IJsbrands | | BIRTH | 21 October 1736 | Wonseradeel | | REF # | | 21739; | | FATHER | IJsbrand Jacobs | | MOTHER | Trijntje Ybles |
| | | CHILDREN | | 1. | Tryntie Clazes FEMALE | | | BIRTH | 4 March 1763 | Pingjum | | REF # | | 21744; |
| | 2. | Douwe Clazes MALE | | | BIRTH | 3 April 1765 | Pingjum | | REF # | | 21745; |
| | 3. | Brandt Clazes MALE | | | DEATH | 1766 | | | BIRTH | 17 December 1766 | Pingjum | | REF # | | 21750; |
| | 4. | Lolkie Clazes FEMALE | | | DEATH | 1769 | | | BIRTH | 7 October 1769 | Pingjum | | REF # | | 21752; |
| | 5. | IJsbrand Clazes MALE | | | DEATH | 1772 | | | BIRTH | 6 October 1772 | Pingjum | | REF # | | 21755; |
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