From Zappa Wiki Jawaka
Born Peter Ceragioli Jr. June 5, 1932 in New Haven, CT. Died: November 6, 2004 in Pasadena, CA.
Pete Jolly was a child prodigy on the accordion. He changed his stage name after a radio announcer mispronounced his name as Jolly. He moved to Los Angeles in 1954 and joined the Jazz Club circuit. He worked on many sessions recording film and TV soundtracks including: "Get Smart", "I Spy", "M*A*S*H", "Dallas", and "Butch Cassidy and the Sundance Kid"
Pete Jolly provided piano, celeste and electric harpsichord for Lumpy Gravy.