When copying data from this family tree, please include a reference to the origin: Lex Hoogendoorn, "Family tree Hoogendoorn / Roeleveld / Buijse / den Dolder", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-hoogendoorn-roeleveld-buijse-den-dolder/R7928.php : accessed May 13, 2024), "Otto van Hammerstein (????-1036)".
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