Julius Wolff was a son of Levie Wolff, butcher and cattle merchant, and Ida Jacobsohn. On 9 August 1911 in Tilburg, he married Betsy Gersons, daughter of Levie Gersons, merchant in rags, and Leentje de Jonge. The couple had three children, including sons Louis and Ernst. The latter played violin.
Julius (nicknamed Jules) Wolff completed the the higher secondary school B and then took the state e…