The Silbermann family moved to Heerlen in 1933. In August 1942 the family decided to go into hiding. They soon were betrayed, arrested and transported.
F. van Rooij-Trienekens, Joden in Heerlen in de Tweede Wereldoorlog ; Omdat wij Joden waren (Beek-Ubbergen 1998) 50-51
The Police Commissioner of Heerlen requested that Naftali Silbermann, his wife Ryfka Lieberman and their daughter Debora Klara Silbermann be located, detained and brought in. They were suspected of having changed their place of residence without the required authorization. This description referred to Jews who had gone into hiding.
Algemeen Politieblad, nr 36, 10 September 1942, 1026, notice 1880