Izak Os

The police commissioner, head of the juvenile precinct of Amsterdam, requested that the minor Izak Os, residing at 137 Sarphatistraat, upstairs, in Amsterdam, be located. He had been missing since 14 July 1942. This description referred to Jews who had gone into hiding.
Algemeen Politieblad, nr 33, 20 August 1942, 952, notice 1613

We have been unable to determine whether one or more members of this family survived the war. While their names do not appear on the lists of survivors, we have not been able to trace them in In Memoriam either. They are therefore labeled as 'surviving' and their names are not listed.

In addition, a Jokos file (number 10406) on this family is at the Amsterdam Municipal Archive. Access is subject…

Jochem en Antoinette Os-Polak werden samen met hun zoon Izak op 14 oktober 1943 gearresteerd op hun onderduikadres in de Molenstraat in Santpoort-Dorp. 

Bron: Velsen bezet en bevrijd, Guus Hartendorf.