Harpo Marx for the name Adolph (as a child, he was routinely called "Ahdie" instead). The name change may have also happened because of the similarity between Harpo's name and Adolph Marks, a prominent show business attorney in Chicago. Urban legends stating that the name change came about during World War I due to anti-German sentiment in the US, or during World War II because of the stigma that Adolf Hitler imposed on the name, are groundless. His first screen appearance was in the film "Humor Risk" (1921), with his brothers, although according to Groucho, it was only screened once and then
Zeppo Marx that "Herbie" was tagged with the name "Zippo" because he liked to do chinups and acrobatics, as the chimp did in its act. The youngest brother objected to this nickname, and it was altered to "Zeppo". In a TV Interview, Zeppo said that Zep is Italian-American slang for baby and as Zeppo was the youngest or baby Marx Brother he was called Zeppo. Zeppo replaced brother Gummo in the Marx Brothers stage act when the latter joined the army in 1918. Zeppo remained with the team and appeared in their successes in vaudeville, on Broadway and the first five Marx