Claude Thornhill was an influential American pianist, arranger, composer, and bandleader, born on August 10, 1909, in Terre Haute, Indiana, and passed away on July 1, 1965, in Caldwell, New Jersey. Known for his pioneering contributions to the cool jazz movement, Thornhill's work left a significant impact on the jazz genre, influencing notable musicians such as Miles Davis.

Thornhill's early musical education included studies at the Cincinnati Conservatory and the Curtis Institute in Philadelphia, where he honed his skills in piano, harmony, counterpoint, and arranging. His professional career began with Austin Wylie's band in Cleveland, after which he moved to New York in 1931. Thornhill worked with several prominent orchestras, including those of Benny Goodman, Paul Whiteman, and Ray Noble.

In 1939, Thornhill formed his own orchestra, which became known for its innovative arrangements and unique sound, characterized by the use of six clarinets in unison and French horns. His orchestra gained national attention after a successful engagement at the Glen Island Casino in 1941, where they were featured on national radio broadcasts. The band's repertoire included Thornhill's compositions "Snowfall" and "I Wish I Had You," the former becoming a jazz and pop standard.

Thornhill's orchestra served as a platform for future jazz luminaries, including arranger Gil Evans and saxophonist Lee Konitz, both of whom contributed to the development of the cool jazz style. Despite the challenges posed by World War II, Thornhill's orchestra remained influential, known for its lush, melodic ballads and innovative sound. His legacy continues to be celebrated for its impact on the evolution of jazz music.