When copying data from this family tree, please include a reference to the origin: Klaas Pera, "Family tree Helmantel", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-helmantel/I28740.php : accessed May 2, 2024), "Mayer Frank (± 1747-1812)".
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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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