Betje Nopol-Mok was widow of Jacob Nopol (Amsterdam, 1865 - Amsterdam, 1927). They married at 9 November 1894 in Haarlem.
According to a list with shops of Jewish owners, compiled by the Amsterdam police in 1940, this family had an ironmonger's shop, address: Haarlemmerdijk 108 in Amsterdam.
Abstracts of the police archives which are currently at the Amsterdam municipal archives