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The Family tree Beumkes / Jonkers / Van Atten / Hogeweg publication was prepared by Marina Beumkes (contact is not possible).
When copying data from this family tree, please include a reference to the origin: Marina Beumkes, "Family tree Beumkes / Jonkers / Van Atten / Hogeweg", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-atten/I868.php : accessed January 25, 2026), "Willem (Wilhelmus) Siebers (1748-1812)".
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