Lester Willis Young (August 27, 1909 - March 15, 1959), nicknamed "Prez", was an American jazz tenor saxophonist and clarinetist. He is remembered as one of the finest, most influential players on his instrument and for inventing or establishing much of the hipster ethos which came to be associated with jazz. Wikipedia
The definitive Wikipedia entry for Lester Young. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Lester_Young