List of Famous people named William

William Henry Waddington was a French statesman who served as Prime Minister in 1879, and as an Ambassador of France.

William Ros or Roos, 1st Baron Ros of Helmsley, was one of the claimants of the crown of Scotland in 1292 during the reign of Edward I.

William John Fellner was a Hungarian-American economist and Sterling Professor of Economics at Yale University from 1952 until his retirement in 1973. Born in Budapest, Austria-Hungary, he studied at the University of Budapest, the ETH Zurich and the Frederick William University in Berlin, where he received his Ph.D. in economics in 1929, one year after Wassily Leontief. Fellner served on the Council of Economic Advisers from 1973 to 1975.

William Francis du Pont Jr. was an English-born, American businessman and banker, and a prominent figure in the sport of Thoroughbred horse racing. He developed and designed more than 20 racing venues, including Fair Hill at his 5,000-acre estate in Maryland. A member of the Delaware Du Pont family, he was the son of William du Pont and Annie Rogers Zinn, and brother to Marion duPont Scott, a noted horsewoman and breeder.

Sir William Borthwick, 3rd Lord Borthwick was a Scottish nobleman, ambassador, and Master of the King's Household in 1485.

William Egan Colby was an American intelligence officer who served as Director of Central Intelligence (DCI) from September 1973 to January 1976.