When copying data from this family tree, please include a reference to the origin: Lia Lancaster Verhaaf, "Family tree Verhaaf- van Beek", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-verhaaf-van-beek/I2438.php : accessed April 29, 2024), "Derkje van den Oosterkamp (????-< 1850)".
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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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