When copying data from this family tree, please include a reference to the origin: Wilma During, "Family tree During, van der Kolk, van den Bosch, Prins, Stegeman, Molenaar, Bos", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-during/R1328.php : accessed January 6, 2026), "Janna Blankvoort (1829-????)".
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