Achterhoek Ancestors
Family: Derk Jan Buhler / Willemina Oonk (F11989)
m. 19 Mar 1868Garritjen ter Schegget (1822- ) 
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Jan Hendrik Oonk (1805- )
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| Elisabeth Wikkerink (1800- )
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Geertruid Oonk (1832- )  |
| Gerrit Jan Oonk (1834- ) |
| Jan Willem Oonk (1836- ) |
| Janna Geertruid Oonk (1838- ) |
| Gesina Oonk (1840- ) |
| Derk Jan Buhler (1843-1922)
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| Willemina Oonk (1844-1873)
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| Gerrit Jan Buhler (1869-1964) |