When copying data from this family tree, please include a reference to the origin: Jason van Beurden, "Genealogische verzameling Van Beurden x Swanenberg - Van Vliet x Bakkers", database, Genealogy Online (https://www.genealogieonline.nl/genealogische-verzameling-van-beurden/I42218.php : accessed May 25, 2024), "Johanna Maria Bertens (Martens) (1779-1814)".
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