Rika Dingsdag was the only daughter of the twelve children of Levie Dingsdag and Mietje Theeboom; she was born as the 10th child on 10 June 1912 in Amsterdam. She was employed as a seamstress and married on 16 June 1937 Zacharias Walvis, a son of Hartog Walvis and Sara Roodveldt. He was born on 10 October 1911 in Amsterdam and was a tailor by trade too. On 15 September 1938 their daughter Sara wa…