When copying data from this family tree, please include a reference to the origin: Harm Jan Luth-Mulders, "Genealogische Databank Maassluis", database, Genealogy Online (https://www.genealogieonline.nl/genealogische-databank-maassluis/I10935.php : accessed May 21, 2024), "Johannes Mattheus Koebergen (± 1790-????)".
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