Jacob Salomon Vos was a son of Salomon Vos and Sientje Les. He was born on 12 April 1900 as youngest in a family with six children in total, of whom one girl, Clara, born on 23 July 1887, already died on 13 August 1888, just one year old. Then there were Sara, born 1885, who was murdered in 1942 in Auschwitz; another Clara, born 1891, who was murdered in Sobobor in 1943, Rosa, born 1893, who survi…