When copying data from this family tree, please include a reference to the origin: Drs. R.A. Corbeij, "Family tree Corbey", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-corbey/I25504.php : accessed February 3, 2026), "Willem van Gulik Wachtendonk (± 1385-± 1440)".
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