William Cooper may refer to: Wikipedia
Harry Summerfield Hoff (4 August 1910 – 5 September 2002) was an English novelist, writing under the name William Cooper. Wikipedia
William Cooper (December 2, 1754 – December 22, 1809) was an American merchant, land speculator and developer, the founder of Cooperstown, New York. A politician, he was appointed as a county judge and later served two terms in the United States Congress, representing Otsego County and central New York. He was the father of James Fenimore Cooper, who became a noted writer of historical novels related to the New York frontier. Wikipedia