Marx Brothers since he did not join the act until Gummo had departed. As with Groucho, three explanations exist for Herbert's name "Zeppo": Maxine Marx reported in "The Unknown Marx Brothers" that the brothers listed their "real" names (Julius, Leonard, Adolph, Milton, and Herbert) on playbills and in programs, and only used the nicknames behind the scenes, until Alexander Woollcott overheard them calling one another by the nicknames. He asked them why they used their real names publicly when they had such wonderful nicknames, and they replied, "That wouldn't be dignified." Woollcott answered with a belly laugh. Woollcott did not meet the
Marx Brothers one day after heart surgery. In 1966 Filmation produced a pilot for a Marx Brothers cartoon. Groucho's voice was supplied by Pat Harrington Jr. and other voices were done by Ted Knight and Joe Besser. In 1970, the four Marx Brothers had a brief reunion of sorts in the animated ABC television special "The Mad, Mad, Mad Comedians", produced by Rankin-Bass animation (of "Rudolph the Red-Nosed Reindeer" fame). The special featured animated reworkings of various famous comedians' acts, including W. C. Fields, Jack Benny, George Burns, Henny Youngman, the Smothers Brothers, Flip Wilson, Phyllis Diller, Jack E. Leonard, George Jessel