When copying data from this family tree, please include a reference to the origin: Jan Joost Sonneveld, "Family tree Sonneveld en aanverwanten", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-sonneveld-en-aanverwanten/I11696.php : accessed May 26, 2024), "Johannes Antonius Haselbarg (1877-1938)".
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