When copying data from this family tree, please include a reference to the origin: Theo Klumpers, "Family tree Klumpers", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-klumpers/I17849.php : accessed June 21, 2024), "Gheneken Gen "Gerard" van der Aa van Boecsteyl (± 1258-< 1314)".
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