Joseph Messcher was a son of Meijer Messcher and Henne van Straten. He married 18 August 1915 in Amsterdam to Engeltje Kool, daughter of Elias Kool and Elisabeth Elzas. Their son Meijer was married to Christine Zwaaf.
City Archive of Amsterdam, archive card of Abraham Zwaaf and website www.wiewaswie.nl.