When copying data from this family tree, please include a reference to the origin: Kees den Hollander, "Family tree Den Hollander en Van Dueren den Hollander", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-den-hollander-en-van-dueren-den-hollander/I6000000019181626473.php : accessed April 30, 2024), "Gérard de Harchies (± 1310-1366)".
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