Isaac Aron Mok, the eldest son of Joseph Mok and Leentje Kaanis. His parents were married in October 1906 in Amsterdam and he was born there on 26 March 1907. Isaac Aron became a tailor by profession. In March 1926 he arrived from Amsterdam in Rotterdam, where he came living in with the family of Leon Wessels and Mietje Slier. On 29 July 1931 he married the daughter of the house, Keetje Wessels an…