When copying data from this family tree, please include a reference to the origin: Helma Bovenschen-van Gelderen, "Genealogy Bovenschen, Looijenga, Van Gelderen en Van Donk", database, Genealogy Online (https://www.genealogieonline.nl/genealogie-bovenschen/I83536.php : accessed June 18, 2024), "Wilhelmus Johannes Petrus van Gerwen (± 1890-????)".
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