Jozeph Posener was a son of Abraham Posener and Rozina Sanders. He married Schoontje Werkheim in 1923 in Amsterdam. They had a daughter Rozina. They divorced in 1926. Jozeph Posener remarried Frederika de Jonge in 1937 in Amsterdam.
Stadsarchief Amsterdam, archiefkaart Jozeph Posener
After Februari 1941 Joseph Posener worked in the harbour of Amsterdam for some time. His payment was collected at Hotel Krasnapolsky in Amsterdam, by a neighbour of the Posener family.
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