When copying data from this family tree, please include a reference to the origin: Theo Klumpers, "Family tree Klumpers", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-klumpers/I7411.php : accessed May 21, 2024), "Arent Willmsz van Tetrode (1345-> 1390)".
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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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