When copying data from this family tree, please include a reference to the origin: H.M. Koehorst - Oldenzaal NL, "Family tree Koehorst - Wolbert", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-koehorst-wolbert/I1281.php : accessed May 18, 2024), "Pieter Valkenstein".
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