List of Famous people named William

William Sellers was a mechanical engineer, manufacturer, businessman, and inventor who filed more than 90 patents, most notably the design for the United States standard screw thread. As president of the Franklin Institute in Philadelphia, Pennsylvania, Sellers proposed the adoption of a system of screw threads which was easier for ordinary mechanics and machinists to cut than a similar design by Joseph Whitworth. For many years, he led the machine tool firm of William Sellers & Co., which was a very influential machine tool builder during the latter half of the 19th century.

William Cooper 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.