Ruth Underwood

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Ruth Underwood
Underwood playing at a Frank Zappa concert, c. 1975
Background information
Birth name	Ruth Komanoff
Born	(1946-05-23) 23 May 1946 (age 78)
Genres	Jazz-rock/rock
Occupation(s)	Musician, composer
Instrument(s)	Xylophone, marimba, vibraphone, piano, synthesizer
Years active	1967–1982
Labels	Philips Records, Bell Records, DiscReet Records

Ruth Underwood (born Ruth Komanoff; May 23, 1946) is an American musician best known for playing xylophone, marimba, vibraphone, and other percussion instruments in Frank Zappa and the Mothers of Invention. She collaborated with the Mothers of Invention from 1968 to 1977.