When copying data from this family tree, please include a reference to the origin: Henry Sikkema, "Sikkema - de Leeuw Family Tree", database, Genealogy Online (https://www.genealogieonline.nl/sikkema-de-leeuw-family-tree/I6218.php : accessed June 23, 2024), "Jacob Kornelis van der Nes (1758-????)".
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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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