List of Famous people named William

Sir William Hall-Jones was the 16th Prime Minister of New Zealand from June 1906 until August 1906.

William Patrick Clark Jr. was an American rancher, judge, and public servant who served under President Ronald Reagan as the Deputy Secretary of State from 1981 to 1982, United States National Security Advisor from 1982 to 1983, and the Secretary of the Interior from 1983 to 1985.

William Whiston was an English theologian, historian, and mathematician, a leading figure in the popularisation of the ideas of Isaac Newton. He is now probably best known for helping to instigate the Longitude Act in 1714 and his important translations of the Antiquities of the Jews and other works by Josephus. He was a prominent exponent of Arianism and wrote A New Theory of the Earth.

Sir William Cornelius Van Horne, succeeded Lord Mount Stephen as president of the Canadian Pacific Railway (CPR) in 1888. He was a prominent member of the Whitney syndicate that created the Cuba Railroad Company, incorporated at Trenton, New Jersey, in 1900 with a capitalization of $8,000,000. He lived at the Van Horne Mansion in Montreal's Golden Square Mile.

Sir William Heerlein Lindley was a British civil engineer. One of three sons of the famous British engineer William Lindley, WH Lindley worked together with his father on a number of projects and was a respected engineer in his own right. Between 1881 and 1889 he oversaw the construction of Warsaw waterworks, designed by his father in 1876–1878. He oversaw the construction of the sewage system in Prague, built between 1895 and 1906, which is still in use today, and Sewage plant in Bubeneč in Prague, which was in use from 1907 until 1967 and currently its building serves as a museum of Prague's sewage system and is highly dedicated to Lindley. Between 1897 and 1898 he worked on the project for a water-supply system for Iași, which he linked, via an underground cast-iron aqueduct, to an aquifer located 103 kilometres away, in Timișești, Neamț County; Lindley's project was materialised in 1911, and the water system is still used. He also coordinated the project for Baku's water supply system, working from 1899 up until his death in 1917. In 1909 he also designed a water and sewerage system for Łódź, Poland, although the expense of the system meant the project was shelved until the 1920s.