Genealogie familie Willemsen
Genealogie van o.a. de Familie Willemsen, Dicks, van Londen, Holkamp, versijp
Gezin: Jan Peters / Jantjen Roelofs Dercksen (F1718133192)
 | Roelof Dercksen (1650- ) 
|
 | Theodora Roelofs Dercksen (1675- )  |
| Lucas Roelofs Dercksen (1681- ) |
| Gerritjen Roelofs Dercksen (1685- ) |
| Albertus Roelofs Dercksen (1688- ) |
| Jantjen Roelofs Dercksen (1678- )
|
| Elisabeth jansen Peters (1698- ) |