When copying data from this family tree, please include a reference to the origin: A.W.M. (Dolf) van der Valk, "Family tree Van der Valk", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-der-valk/I6115.php : accessed June 2, 2024), "Johannes Cornelis "Joes (jannes)" Lauwers (Louwers)".
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