Ronald Nathan Bell aka Khalis Bayyan, was an American composer, singer, songwriter, arranger, producer, saxophonist and co-founding member of Kool & the Gang. The band recorded nine No. 1 R&B singles in the 1970s and 80s, including its No. 1 pop single "Celebration". The group is honored on the Hollywood Walk of Fame and was inducted into the Songwriters Hall of Fame.

Ronald Bell and his brother, Robert "Kool" Bell, were introduced to jazz at around five or six. The family moved to Jersey City, New Jersey, in 1960. In 1964, the brothers joined neighborhood friends Spike Mickens, Dennis Thomas, Ricky Westfield, George Brown, and Charles Smith to create a distinctive musical blend of jazz, soul, and funk.[11] At first calling themselves "The Jazziacs", the band went through various name changes—the New Dimensions, the Soul Town Band, and Kool & the Flames—before settling on Kool & the Gang in 1968.

Ronald Bell composed, arranged, produced and performed some of the most popular music. He was a self-taught musician, and his distinctive sound is on the group's horn lines, bass, synthesizer and vocals. He wrote and produced many of the Kool & the Gang's songs, including "Celebration", "Cherish", "Jungle Boogie", "Summer Madness", and "Open Sesame". He said his favorite song was "Celebration", which he wrote after reading a passage in the Quran.

Bell was Muslim, and was given the name Khalis Bayyan by Imam Warith Deen Mohammed. He was married to Tia Sinclair Bell and had 10 children. His son, Rachid, released his debut album in 1998.

Bell died at his home in the United States Virgin Islands on September 9, 2020, at age 68. No cause was given, but the death was described as sudden.

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