When copying data from this family tree, please include a reference to the origin: Renate Trummler, "Stammbaum der Familie Trummler und Zeller", database, Genealogy Online (https://www.genealogieonline.nl/stammbaum-trummler-und-zeller/I696442.php : accessed May 25, 2024), "Berthold von Genkingen (± 1190-± 1254)".
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