Genealogie familie Willemsen
Genealogie van o.a. de Familie Willemsen, Dicks, van Londen, Holkamp, versijp
Gezin: Johannes Albartus Derksen / Theodora Margritha Willemsen (F1713212822)
getr. 24 aug 1898 | Albertus Willemsen (1845-1915) 
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 | Theodora Margritha Martens (1848-1885)
|
| Theodora Hendrika Willemsen (1873-1951)  |
| Johannes Albartus Derksen (1876-1944)
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| Theodora Margritha Willemsen (1875-1958)
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| Johannes Albartus Derksen (1898- ) |
| Derkje Maria Derksen (1900- ) |
| Albartus Wilhelmus Derksen (1902- ) |
| Theodora Margaritha Derksen (1904- ) |
| Petrus Wilhelmus Gerardus Derksen (1906- ) |
| Gerardus Derksen (1908- ) |
| Maria Derksen (1910- ) |
| Hendrika Theodora Derksen (1912-1912) |
| Margaretha Theodora Derksen (1912- ) |
| Hendrikus Theodorus Derksen (1914-1915) |