Abraham Charles Mok was a son of Jacob Mok and Bertha Schechter.
Both parents have survived the Holocaust. His sister Nardia Andrea did survive the war too but his sister Zwaantje Rosalie did not.
City Archive of Amsterdam, Archive card of Abraham Charles Mok, Zwaantje Rosalie Mok,and Jacob Mok.
For a biographical note see: H.E. Dominicus, Mauthausen. Een gedenkboek (2e herziene en uitgebreide druk; Amsterdam 1999) 107-108.