When copying data from this family tree, please include a reference to the origin: Pieter van Kammen, "Family tree van Kammen Bouma ea", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-kammen-bouma/I5394.php : accessed June 23, 2024), "Joannes Wilhelmi van Velsen (????-1604)".
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