When copying data from this family tree, please include a reference to the origin: A.B.M. van Helsdingen, "Stamboom Ho(o)genbos(ch)", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-hogenbos/I2837.php : accessed May 2, 2024), "Johannes Bernardus Calvelage (± 1889-????)".
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