Abraham Dingsdag was the second child of Levie Dingsdag and Mietje Theeboom. He was born in Amsterdam on 9 February 1897. The first born in the Levie Dingsdag family was Mozes, born on 19 March 1896 but he died already 3 April 1896, just two weeks old.
Levie and Mietje's family expanded continually; in the years that followed, Abraham had ten more siblings, of which one child - again called Moses …