Abraham Crost was a son of Michel Crost and Hanna Vas Dias. He married 31 July 1912 in Amsterdam to Bertha Biedermann, a daugher of Maijer Markus Biedermann and Justine Kan. In 1913 Abraham and Bertha had a daughter, who went to England in 1940 and has survived the war.
On 17 December 1926, Abraham Crost divorced Bertha Biedermann and one year later, on 16 February 1928, he remarried the widow of …