Tresia Blitz was a daughter of Samuel Blitz and Anna de Swarte. She married Barend Koopman in Amsterdam on 8 June 1938 in Amsterdam, a son of Levie Koopman and Deborah Vogel.
City Archive of Amsterdam, archive card of Tresia Blitz and Barend Koopman.
Tresia is een dochter van Samuel Blitz en Anna de Swarte. Ze trouwde juni 1938 met Barend Koopman (A'dam, 30 april 1909).
Bron SAA archiefkaart Tresia Blitz 8-12-1912
In addition, a Jokos file (number 2793) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.