When copying data from this family tree, please include a reference to the origin: Cor de Bruijn, "Family tree Bosma-Olde Hampsink", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-bosma-en-olde-hampsink/I2902.php : accessed June 9, 2024), "Claes Jacobs Claeszn van Velthuijsen (± 1510-????)".
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