William Cornysh the Younger (also spelled Cornyshe or Cornish) (1465 – October 1523) was an English composer, dramatist, actor, and poet.In his only surviving poem, which was written in Fleet Prison, he claims that he has been convicted by false information and thus wrongly accused, though it is not known what the accusation was. He may not be the composer of the music found in the Eton Choirbook, which may alternatively be by his father, also named William Cornysh, who died c. 1502. The younger Cornysh had a prestigious employment at court, as Master of the Children of the Chapel Royal; and being responsible for the musical and dramatic entertainments at court and during important diplomatic events such as at the Field of the Cloth of Gold in 1520; and visits to and from the courts of France and the Holy Roman Empire, which he fulfilled until his death. He died in 1523, his birth date unknown.