List of Famous people named William

William VI, Landgrave of Hesse-Kassel, known as William the Just, was Landgrave of Hesse-Kassel from 1637 to 1663.

William Henry Ashe à Court-Holmes later Holmes-à Court, 2nd Baron Heytesbury was a British peer and Conservative Member of Parliament.

William Kerr, first Earl of Lothian of a new creation (1605–1675) was a Scottish nobleman.

William Pitt, 1st Earl of Chatham, was Prime Minister of Great Britain from 1766 to 1768. Historians call him Pitt of Chatham, or William Pitt the Elder, to distinguish him from his son, William Pitt the Younger, who also was a prime minister. Pitt was also known as the Great Commoner, because of his long-standing refusal to accept a title until 1766.

William Cavendish, 7th Duke of Devonshire,, styled as Lord Cavendish of Keighley between 1831 and 1834 and known as The Earl of Burlington between 1834 and 1858, was a British landowner, benefactor, nobleman, and politician.