• Sir William Petty - economist
• Sir William Ramsay - Nobel prize winner - 1904
• William A. Mitchell, (1911-2004), key inventor behind Pop Rocks, Tang, and Kool Whip
• William Alfred Fowler - astronomer (USA, 1911 - 1995)
• William Alwyn - music composer (1905-1985)
• William Anders, first Asian-born person in space. (Anders was born in Hong Kong, but was an American citizen of Caucasian parents.) - astronaut
• William Appleman Williams US diplomatic
• William Armstrong Percy, Medieval Europe and ancient Greek and Roman history. History of Homosexuality.
• William B. Lenoir - astronaut
• William Barak (1824-1903) - painter
• William Baumol - economist
• William Bentley (1836-1910) - painter
• William Berczy (1744-1813) - painter
• William Bergsma - music composer (1921-1994)
• William Bolcom - music composer (born 1938)
• William Bowrey - tennis player (1943-) - (Australia) - 1968 Australian Championships champion, 1969 Australian Open quarter-finalist
• William Bradford Shockley, (1910-1989), USA - inventor - co-inventor of transistor
• William Brainard - economist
• William Brandon, (1914-2002), historian of the American West and Native Americans
• William Breit - economist
• William Butler Yeats - Nobel prize winner - 1923
• William C. McCool (1961-2003), died in the Space Shuttle Columbia disaster. - astronaut
• William Chirchir - athlete
• William Clothier - tennis player (1881-1962 - (USA)
• William Constable (1906-1989) - painter
• William Cook - billionaire
• William Cranch Bond - astronomer (USA, 1789 - 1859)
• William Cullen, (1710-1790), UK - inventor - first artificial refrigerator
• William Dargie (1912-2003) - painter
• William Davidson - billionaire
• William Davies Evans - chess player (Wales, 1790-1872)
• William Delafield-Cook (1936-) - painter
• William Dobell (1899-1970) - painter
• William Duckworth - music composer (born 1943)
• William Easterly - economist
• William Eccles - UK (1875-1966) - physicist
• William Erese - athlete
• William F. Giauque - Nobel prize winner - 1949
• William Faulkner - Nobel prize winner - 1949
• William Frederick Fisher - astronaut
• William Friese-Greene, (1855-1921), England - inventor - cinematography
• William George Armstrong, (1810-1900), UK - inventor - hydraulic crane
• William Gilbert - England (1544-1603) - physicist
• William Golding - Nobel prize winner - 1983
• William Graham Sumner - economist
• William Grant Still - music composer (1895-1978)
• William Gregory - astronaut
• William H. McCrea - astronomer (UK, 1904 - 1999)
• William Hardin Graham ???
• William Hartston - chess player (England, 1947- )
• William Henry Pickering - astronomer (USA, 1858 - 1938)
• William Herschel - astronomer (UK, 1738 - 1822)
• William Holden - actor - known for Network as "Max Schumacher"
• William Hoskins, Landscape History
• William Huggins - astronomer (UK, 1824 - 1910)
• William Hurt - actor - known for Broadcast News as "Tom Grunick"
• William Hyde Wollaston, (1766-1828), English chemist
• William Jevons - economist
• William Kemei - athlete
• William Kennedy Laurie Dickson, (1860-1935), UK - inventor - motion picture camera
• William Kenneth Hartmann - astronomer (USA, 1939 - )
• William Kiplagat - athlete
• William Koech - athlete
• William Kraft - music composer (born 1923)
• William Kroll - music composer (1901-1980)
• William L. Langer, (1896-1977), US historian, World and diplomatic history
• William Larned - tennis player (1872-1926) - (USA)
• William Lassell - astronomer (UK, 1799 - 1880)
• William Lawrence Bragg - Australia (1890-1971) - physicist
• William Leuchtenburg, American political and legal history
• William Lipscomb - Nobel prize winner - 1976
• William Lombardy - chess player (USA, 1937- )
• William Manchester, Author of "The Last Lion", among others. A definitive Chuchill biographer.
• William Markowitz - USA (1907-1998) - physicist
• William McArthur - astronaut
• William McNeill, world history
• William Mutwol - athlete
• William Oefelein - astronaut
• William P. Latham - music composer (1917-2004)
• William Pailes - astronaut
• William Parsons, Lord Rosse - astronomer (Ireland, 1800 - 1867)
• William Perkin, (1838-1907) British organic chemist and inventor of mauveine (dye)
• William Perry - music composer (born 1930)
• William Phillips - economist
• William Pidgeon - painter
• William Pogue - astronaut
• William Powell - actor - known for Life with Father as "Clarence ´Father´ Day"
• William Prout - UK (1785-1850) - physicist
• William R. Kanne - USA - physicist
• William Ramsay, (born 1852), Scottish chemist
• William Readdy - astronaut
• William Renshaw - tennis player (1861-1904) - (England)
• William Robert Brooks - astronomer (USA, 1844 - 1922)
• William Robinson (1936- ) - painter
• William Rowan Hamilton - Ireland (1805-1865) - physicist
• William Rutter Dawes - astronomer (UK, 1799 - 1868)
• William S. McFeely - 1982 Pulitzer Prize for Biography or Autobiography for Grant: A Biography
• William Schuman - music composer (1910-1992)
• William Shepherd - astronaut
• William Sigei - athlete
• William Simms - astronomer (1793 - 1860)
• William Strutt (1825-1915) - painter
• William Tanui - athlete
• William Thomson (Lord Kelvin) - UK (1824-1907) - physicist
• William Thornton - astronaut
• William Vickrey - economist
• William Wallace Campbell - astronomer (USA, 1862 - 1938)
• William Walton - music composer (1902-1983)
• William Westall (1781-1850) - painter
• William Wilson Morgan - astronomer (USA, 1906 - 1994)
• William Winter - chess player (England, 1898-1955)
• William Wrigley, Jr. - billionaire
• William Yiampoy - athlete
• William-Adolphe Bouguereau (1825-1905) painter

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