When copying data from this family tree, please include a reference to the origin: Kees Willems, "Family tree Willems Hoogeloon-Best", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-willems-hoogeloon-best/I53847.php : accessed September 5, 2026), "Ulrich II de ARC (????-± 1167)".
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