Check the information Open Archives has about Janzen.
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The publication 400 jaar Familie Burgmans Zuid Holland en Brabant has been compiled by Willem Burgmans (contact is not possible).
When copying data from this family tree, please include a reference to the origin: Willem Burgmans, "400 jaar Familie Burgmans Zuid Holland en Brabant", database, Genealogy Online (https://www.genealogieonline.nl/400-jaar-familie-burgmans/I0582.php : accessed January 23, 2020), "Hendrik Janzen (????-)".
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