Eliazar Hakker was a son of Jacob Hakker and Mietje van der Kloot from Den Haag. On 18 August 1925 he married Alice Allemans in Antwerp, a daughter of Abraham Allemans and Bliemei Ruchel Eijsen. Alice, born in the Swiss city of Bern in 1904, was legalized five years later as their daughter at the ti…