Isaac Blitz was a son of Marcus Blitz and Parle da Costa da Fonceca. He married 1 July 1908 to Keetje Schoenlapper from Almelo Stad, a daughter of Manus Schoenlapper and Rachel Samuel. However Keetje passed away in Amsterdam on 9 July 1922 and was interred in the Jewish Cemetery in Diemen. The couple had six children: Rachel, Parle, Sientje, Mietje and two sons named Marcus, who both have died at …