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/I33840.php : accessed June 2, 2024), "Gerrit Jan ten Harmsen (????-1828)".
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Request permission to copy data or at least inform the author, chances are that the author gives permission, often the contact also leads to more exchange of data.
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