When copying data from this family tree, please include a reference to the origin: Hans van Melis, "Sigarenfabrikanten en anderen in Eindhoven en de Kempen", database, Genealogy Online (https://www.genealogieonline.nl/sigarenfabrikanten-eindhoven/I11965.php : accessed June 10, 2024), "Petrus Maas (± 1810-< 1891)".
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