Check the information Open Archives has about Van Koppenaal.
Check the Wie (onder)zoekt wie? register to see who is (re)searching Van Koppenaal.
The Family tree Van Willigen publication was prepared by Rob van Willigen (contact is not possible).
When copying data from this family tree, please include a reference to the origin: Rob van Willigen, "Family tree Van Willigen", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-willigen/I6945.php : accessed January 25, 2026), "Lena Sandersdr. van Koppenaal".
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Request permission to copy data or at least inform the author, chances are that the author gives permission, often the contact also leads to more exchange of data.
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