Check the information Open Archives has about Hartogs.
Check the Wie (onder)zoekt wie? register to see who is (re)searching Hartogs.
The Family tree Hartogs publication was prepared by Giovanni Hartogs (contact is not possible).
When copying data from this family tree, please include a reference to the origin: Giovanni Hartogs, "Family tree Hartogs", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-familie-hartogs/I1778.php : accessed June 2, 2024), "Tillie Hartogs".
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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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