Arthur Julius Marx (July 21, 1921April 14, 2011) was an American writer, the son of entertainer Groucho Marx and his first wife, Ruth Johnson. Early life He was named after Groucho's brother who went by the alternative stage name Harpo. Marx spent his early years accompanying his father around vaudeville circuits in the United States and abroad. When he was 10, the family moved to Southern California, where the Marx Brothers continued their film careers. Tennis Marx was a nationally ranked tennis player before he was 18. While he was attending the University of Southern California, he won the National Freshman Intercollegiate Tennis title at Montclair, New Jersey. At the Tri-State Tennis Tournament, the event that evolved into today's Cincinnati Masters, Marx reached the singles final in 1941 before falling to Bobby Riggs. To reach the final, Marx knocked off future International Tennis Hall of Fame member John Doeg in the round of 16, Frank Froehling Jr. in the quarterfinals, and Gardner Larned in the semifinals. Riggs had blown through his competition to reach the final, and Marx gave him his toughest test of the tournament, stretching the future Hall of Famer to five sets before falling, 11–9, 6–2, 4–6, 6–8, 6–1. War service Marx spent four years in the United States Coast Guard during World War II serving in the South Pacific. He was assigned to the Coast Guard–crewed Army Marine Ship Repair Ship Duluth, which embarked an Army Marine Ship Repair Company for the repair work. Marx, a Yeoman, was aboard when the ship departed San Francisco on August 21, 1944, for Finschhafen, arriving September 24, and then arriving at Hollandia in New Guinea in early October to await departure for the invasion of the Philippines. After a very slow convoy, the ship arrived October 23, three days after the landing at Leyte. Marx was hospitalized at Tacloban for malaria; and, when discharged, was assigned to form and be master of ceremonies of an amateur show providing entertainment for those in rear areas passed over by U.S.O. shows. Marx wrote about this experience in his book Son of Groucho. Literary, radio, and TV career After the war he worked as an advertising copywriter, a radio gag man for Milton Berle, and a writer of Hollywood movies (including four for Bob Hope), Broadway plays and TV scripts for such hit shows as My Three Sons, All in the Family,