List of Famous people named William

William Cranstoun, 3rd Lord Cranstoun was a Scottish Lord of Parliament and a renowned Cavalier.

William Bertrand, known as William V or Bertrand I or II, was the count and margrave of Provence from 1051 to his death. He succeeded his father Fulk Bertrand on his death in that year, but did not receive the margravial title at first, for it went to his uncle Josfred.

William Spencer Vickrey was a Canadian-American professor of economics and Nobel Laureate. Vickrey was awarded the 1996 Nobel Memorial Prize in Economic Sciences with James Mirrlees for their research into the economic theory of incentives under asymmetric information, becoming the only Nobel laureate born in British Columbia.

Francis William Lawvere is a mathematician known for his work in category theory, topos theory and the philosophy of mathematics.

William Frederick Friedman was a US Army cryptographer who ran the research division of the Army's Signal Intelligence Service (SIS) in the 1930s, and parts of its follow-on services into the 1950s. In 1940, subordinates of his led by Frank Rowlett broke Japan's PURPLE cipher, thus disclosing Japanese diplomatic secrets before America's entrance into World War II.