 He and Mary had six granddaughters from their two daughters and a son, Alon, who married a Greek gentile.Geula had two sons and a daughter, and Renana, who worked as a microbiologist at the Israel Institute for Biological Research, had a son.After the death of theorist Ber Borochov, the left-wing and centrist of Poalei Zion split in February 1919 with Ben-Gurion and his friend Berl Katznelson leading the centrist faction of the Labor Zionist movement.