David Samuel Polak was a son of Henri Samuel Polak and Grietje Sanders. He was married to Betty Cohen, a daughter of Samuel Louis Cohen and Frieda Gersons. He and his wife Betty were killed on 23 September 1943 in Auschwitz.
Municipal Archive of Den Haag, certificates of death B712 and B713 dated 14 March 1949 of David Samuel Polak and Betty Cohen.