When copying data from this family tree, please include a reference to the origin: Els Koek, "Family tree Koek (Schokland), Schouten, Bünnemeijer en Bongers", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-koek-schokland/I179.php : accessed June 12, 2024), "Jacob Claasz (± 1691-????)".
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