Barend Blitz was the son of Abraham Blitz and Judith Soesan. He married in Amsterdam on 29 June 1938 to Marianne Roos. City Archive of Amsterdam, archive card of Barend Blitz.
In addition, a Jokos file (number 20847) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.