Albrecht van der Walde (later Abraham Jaari) was born in Emden on October 23, 1906. His father was a master shoemaker. He first was a member of Blue-White (Blau-Weiß), and then JJWB/Brit Haolim. In 1925, he went to Hakhshara in Lower Lusatia as a shepherd. Starting in the summer of 1926, he was a member of the kibbutz Herut and worked for a shepherd in Holzhausen. In 1928, he worked with some members of Herut in Georgstal. In March 1929, via Trieste, he first went to Ein Harod and later lived in Givat Brenner, where he died in 1989.