Helena van der Sluis-van Tijn was the daughter of Mozes van Tijn and Debora Roosje van Tijn-Engelschman. She grew up in a family with six children. in 1924 her father died. Both her mother as five of her brothers and sisters didn't survive the war.
Addition of a visitor of the website
In addition, a Jokos file (number 1635) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.