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/R2275.php : accessed June 11, 2024), "Wilhelm Denny (± 1803-????)".
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