When copying data from this family tree, please include a reference to the origin: J. Russchenberg, "Family tree Russchenberg/Wind/Kuijt/Kloos", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-russchenberg/I42828.php : accessed September 21, 2024), "Jan Claasens van Berkum (1735-1778)".
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