When copying data from this family tree, please include a reference to the origin: Dik Krijgsman, "Ancestors Aart Henderinus Krijgsman (1910 Vlaardingen)", database, Genealogy Online (https://www.genealogieonline.nl/kwartierstaat-aart-henderinus-krijgsman/I8447.php : accessed June 6, 2024), "Sijtje Klaasdr. van der Graaf".
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