Julius Wangenheim was born on April 21, 1866 in San Francisco to businessman Sol Wangenheim and Fannie Newman. He received
his B.S. in civil engineering from the University of California at Berkeley in 1887. Upon graduation, Julius began working
with the Southern Pacific Railroad Company, where he remained until 1889. In 1889, he began working for the family business,
the Simon Newman Firm. He married Laura Klauber in 1892. He had one surviving daughter, Alice, who later married George Heyneman,
and a son Richard (1893-1894).