When copying data from this family tree, please include a reference to the origin: Jan den Hengst, "Family tree Den Hengst / Elfferich", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-den-hengst-elfferich/I6330.php : accessed June 22, 2024), "Pieter Jansz. de Graeff".
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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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