When copying data from this family tree, please include a reference to the origin: Kees Helmich, "Family tree Helmich", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-helmich/I22640.php : accessed February 28, 2026), "Toosje Maria Margaretha "Toos" de Roij van Zuijdewijn (1922-2015)".
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