When copying data from this family tree, please include a reference to the origin: Erik Wiersma, "Family tree Wiersma / Bergkamp / Dekkers / Smit", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-wiersma/I3116.php : accessed April 25, 2024), "IJsbrand De Jong (< 1768-< 1837)".
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Please stick to the following rules
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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