Sara Vos was a daughter of Hijman Vos and Lea van West. She was born on 5 March 1889 in Amsterdam and married Marcus Zwaaf in Zaandam on 4 July 1918. He was a son of Hartog Zwaaf and Mietje Goldsteijn, who was born in Amsterdam on 27 November 1891. Marcus was an upholsterer and a merchant in haberdasheries. The Zwaaf-Vos couple had three children, namely Elisabeth in February 1918, Lea in June 192…