Isaac Velleman had a child born out of wedlock, that survived the war.
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 owned a hairdresser's, address: Smaragdstraat 27 in Amsterdam.
Abstracts of the police archives which are currently at the Amsterdam municipal archives
Person is in the National Database of Victims of Persecution