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/I35078.php : accessed May 10, 2024), "Gerrit Jan Exterkate (± 1777-1831)".
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