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/I54165.php : accessed April 26, 2024), "Berchtold I von NEUENBURG (????-< 1273)".
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