When copying data from this family tree, please include a reference to the origin: Willem Vlietstra, "Family tree families Vlietstra, Piebes en aangetrouwde families", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-vlietstra-piebes/I1072310480.php : accessed June 24, 2024), "Jan Aartsz. van Waarthuijsen".
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