When copying data from this family tree, please include a reference to the origin: Jan Joost Sonneveld, "Family tree Sonneveld en aanverwanten", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-sonneveld-en-aanverwanten/I40881.php : accessed May 28, 2024), "Johannes Christinus Nijenhuis (1867-1952)".
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