Catharina Petronella Wilhelmina Wijtenburg 1877–1958 Douwe Petrus Bonk 1864–1952 | | | | Gerardus Arnoldus Cornelis Wijtenburg – Catharina Elisabeth Anna Vogelvanger – |
| | | Pieter Douwes Bonk 1814–1893 Maria Jannetje Nijhoff 1835–1905 | | | | Douwe Pieters Bonk 1780–1855 Emke Pieters Akkerman 1778–1855 | | | | | | | | Tjelling Pieters … 1722–1806 |
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| | | Pieter Tjeerds Akkerman –1795 |
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