1. | Petrus Johannes Hendrikus Osterhaus was born on 28 Jan 1891 in Amsterdam. Petrus married Wilhelmina Johanna Alida de Haart on 21 Jul 1920 (Civil) in Utrecht. Wilhelmina (daughter of Theodorus Franciscus Bernardus de Haart and Maria Elbersen) was born on 19 Aug 1891 in Utrecht; died on 31 May 1955 in Utrecht. [Group Sheet] [Family Chart]
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2. | Cornelia Gerarda Wilhelmina Osterhaus ![]() |