Herbert Manfred "Zeppo" Marx (February 25, 1901 – November 30, 1979) was an American film star, theatrical agent and businessman. He was the youngest of the five Marx Brothers. He appeared in the first five Marx Brothers films, but then left the act to start his second career as a theatrical agent.

Description above from the Wikipedia article Zeppo Marx, licensed under CC-BY-SA, full list of contributors on Wikipedia.