Keith Ian Ellis (19 March 1946 – 12 December 1978) was an English bass player. He was born in Matlock, Derbyshire. He is known for his associations with The Koobas, The Misunderstood and Juicy Lucy. He was also a member of Van der Graaf Generator from 1968 to 1969. Ellis worked with Mike Patto and Ollie Halsall's band Boxer from 1975 until late 1976 when the original line-up split. Ellis died in Darmstadt, Germany in 1978, whilst on tour with Iron Butterfly. No cause of death was determined, although the music journalist Ralph Heibutzki reported in a 2011 edition of Ugly Things that he was the victim of an accidental drug overdose. He left behind a widow, Deborah. The song "Not For Keith" on the album pH7 by Peter Hammill, (1979) was a tribute to Ellis.