When copying data from this family tree, please include a reference to the origin: Rob Vollmar, "Family tree Vollmar, Krüse, Jonker, Van Gulik", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-vollmar/R4402.php : accessed February 27, 2026), "Trijntje Jans Hans (????-1752)".
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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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