Achterhoek Ancestors
Family: Derk Jan Koskamp / Hendrika Winkelhorst (F11845)
m. 12 Feb 1858Tonij Koskamp (1811- ) 
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Aaltjen Klein Hesselink (1801- )
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| Crisjaan Winkelhorst (1793- )
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| Johanna Willemina Eppink (1813-1867)
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| Derk Jan Koskamp (1833-1909)
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| Hendrika Winkelhorst (1836-1914)
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Tonia Christina Koskamp (1858- )  |
| Arent Jan Koskamp (1861-1946) |
| Gerrit Jan Koskamp (1864- ) |
| Christiaan Koskamp (1867- ) |
| Edward Koskamp (1871- ) |
| John Koskamp (1873-1955) |
| Henry Koskamp (1875-1905) |