Betje Bierman was the 2nd child of Levie Bierman and Sara Italiaander. She was born in Amsterdam on 8 September 1897 and married there on 10 April 1918 the diamond polisher Abraham Katwijk, a son of Jacob Katwijk and Sara Gobes, who was born in Amsterdam too on 1 May 1894.
After Betje and Abraham were married, they found living space with the widow Jas at Lange Houtstraat 24a but moved to Nieuwe K…