When copying data from this family tree, please include a reference to the origin: Alexander Roessen, "Family tree Roessen", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-roessen/I9967.php : accessed February 27, 2026), "Cornelis Johannes den Hartogh".
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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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