When copying data from this family tree, please include a reference to the origin: Kees Boas, "Family tree Boas-Bianchi-Baaij-Happee e.v.a.", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-boas/I1633.php : accessed June 2, 2024), "Petronella Maria Johanna van den Bergh (1884-????)".
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