When copying data from this family tree, please include a reference to the origin: Dirk van Ham, "Diverse Groninger boerenfamilies", database, Genealogy Online (https://www.genealogieonline.nl/diverse-groningse-families/I42858.php : accessed June 24, 2024), "Klaas Derks (????-1780)".
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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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