Ruben Heertje was a son of Bernard Heertje and Henriette Bino. He was born in Amsterdam on 25 June 1905 and he worked as an office clerk and was a radio expert. Ruben married on 30 August 1933 Betsie Waterman, who was born on 8 December 1909 in Amsterdam as the daughter of Hartog Waterman and Heintje Granaat. She was working as a sales lady.
On 3 September 1939 their daughter Hannie was born. Rube…