When copying data from this family tree, please include a reference to the origin: Harry van Rijn, "Family tree Van Rijn/Koedooder/Mangnus/Oorthuis", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-rijn-koedooder/I9157.php : accessed May 30, 2024), "Nicolaus Gerrits Claas Keijzer (± 1675-????)".
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