When copying data from this family tree, please include a reference to the origin: Nico van de Velde, "Family tree Van de Velde - Nieuwdorp", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-de-velde-nieuwdorp/I3931.php : accessed May 8, 2024), "Graaf Otto II von Abenberg (1089-1156)".
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