Family Group Sheet| FATHER | | Gerben Johannes Grouwstra | | | | MOTHER | | Rigtje Klases |
| | | CHILDREN | | 1. | Johannes Gerbens Grouwstra MALE | | | BIRTH | 1793 | Irnsum |
| | 2. | Klaas Gerbens Grouwstra MALE | | | BIRTH | 1795 | Irnsum |
| | 3. | Aat Gerbens Grouwstra FEMALE | | | BIRTH | 1798 | |
| | 4. | Pieter Gerbens Grouwstra MALE | | | BIRTH | 1810 | |
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