When copying data from this family tree, please include a reference to the origin: Luc Sillis, "Families Sillis in België", database, Genealogy Online (https://www.genealogieonline.nl/families-sillis-in-belgie/I5122.php : accessed September 22, 2024), "Joannes Petrus Geertsen (1478-1540)".
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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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