Jacob Mug was the youngest of the six children of Mozes Mug and Jetje Brandon. He was born on 12 September 1907 and he worked as an office clerk at the ANWB in The Hague. Previously, he lived at home with his parents in Amsterfdam, but when they moved to Cornelis Springerstraat in the district “De Pijp” on 26 February 1931, Jacob left for Betondorp in Watergraafsmeer, and lived in there shortly wi…