When copying data from this family tree, please include a reference to the origin: F.J.H. Jansen, "Family tree van Harmen Jansen 1720", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-harmen-jansen/I500163.php : accessed September 27, 2024), "Cornelia Regina Martina Biermann".
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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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