When copying data from this family tree, please include a reference to the origin: D.M.J.M. Eras, "Family tree Eras", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-eras/I25255.php : accessed May 10, 2024), "Arnoldus van der Waerden (1726-????)".
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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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