Jonas Swart was the eighth of the nine children of the merchant Levie Swart and Frouwke Kropveld. His father died in Amsterdam on 17 January 1940. Jonas Swart was born at 187 Valkenburgerstraat in Amsterdam.
Jonas Swart was a tin smelter. He married on 25 February 1942. He and his wife had no children. Jonas Swart boxed at the D.O.S. association in Amsterdam.
Jacob Swart's wife survived the war.…