When copying data from this family tree, please include a reference to the origin: Marco van den Heuvel, "Naamonderzoek familie van den Heuvel", database, Genealogy Online (https://www.genealogieonline.nl/naamonderzoek-familie-van-den-heuvel/I15498.php : accessed June 14, 2024), "Willem Koijman Janszoon (????-< 1660)".
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