User blog comment:Drakan95/Barney Stinson vs Johnny Bravo. Epic Rap Battles: Cartoons vs History./@comment-5264252-20150724100201/@comment-5264252-20150725020346

The core of the act was the three elder brothers, Chico, Harpo, and Groucho; each developed a highly distinctive stage persona. The two younger brothers, Gummo and Zeppo, did not develop their stage characters to the same extent, and eventually left the act to pursue other careers. Gummo was not in any of the movies; Zeppo appeared in the first five films in relatively straight (non-comedic) roles.

https://en.m.wikipedia.org/wiki/Marx_Brothers