Trijntje Kooperberg got married to Julius Stern on 15th July 1942. Her parents en three siblings survived the war. One sister, Bethrina, died in Sobibor.
Addition of a visitor of the website, source personcard City Archives Amsterdam
In addition, a Jokos file (number 1215) on this person is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.