The term 'Count of Jazz' is a reference to the jazz musician Count Basie (born William James Basie). He was an American jazz pianist, organist, bandleader, and composer. He was one of the most influential figures in jazz music, and his big band sound became a major influence on swing music. He was known for his bluesy, soulful style and his ability to bring out the best in his musicians. He was also a prolific composer, writing over 400 compositions.