Helena Jas was a daughter of Mozes Jas and Vrouwtje de Laay. Helena Jas was the younger sister of Izaak Jas who lived with her and het husband. Addition of a visitor of the website
According to a list with shops of Jewish owners, compiled by the Amsterdam police in 1940, this family had a grocery shop, address: Waterlooplein 74 in Amsterdam. Abstracts of the police archives which are currently at the Amsterdam municipal archives