Joseph Venetianer was a son of Philip Venetianer and Klaartje Springer. He married on 11 September 1935 in Amsterdam to Mathilda Trijtel, daughter of Philip Trijtel and Judith Verdoner.
City Archive of Amsterdam, archive card of Philip Venetianer and Mathilda Trijtel .
In addition, a Jokos file (number 14107) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.