Dina van Beek was a daugher of Lion Salomon van Beek and Sara Kuhn. She married in Amsterdam on 26 March 1903 to Hijman Polak. The couple had three children together: Lion, Elkan and Salomon. City Archive of Amsterdam, archive card of Hijman Polak and Dina van Beek.
According to a list with shops of Jewish owners, compiled by the Amsterdam police in 1940, this family had a chocolate shop, address Zandstraat 40 in Amsterdam.
Abstracts of the police archives which are currently at the Amsterdam municipal archives