When copying data from this family tree, please include a reference to the origin: Richard Kuiken, "Family tree Kuiken/Kuijken", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-kuiken/I770.php : accessed March 3, 2026), "Johanna Maria van Keulen (????-< 1853)".
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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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