When copying data from this family tree, please include a reference to the origin: G. van Ditzhuijzen, "Family tree Schols", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_schols/I20060.php : accessed February 6, 2026), "Joannes Michiel Ummelen".
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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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