'''William''', '''Bill''', '''Billy''', or '''Willie Riley''' may refer to:
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==Sports== * William Riley (Nottinghamshire cricketer) (1888–1917) * William Riley (Leicestershire cricketer) (1892–1955) * Bill Riley (ice hockey, born 1921) (1921–2000), American ice hockey player * Bill Riley (ice hockey, born 1950) (1950–2026), Canadian ice hockey player * Bill Riley Jr., American ice hockey player and coach * Billy Riley (1889–1977), English professional wrestler, coach, promoter, and referee * Billy Riley (baseball) (1855–1887), outfielder in Major League Baseball
==Arts and entertainment== * Willie Riley (1866–1961), British author * William K. Riley, one of the pen names of British author John Creasey (1908–1973) * Bill Riley Sr. (1920–2006), American entertainer * Billy Lee Riley (1933–2009), American musician
==Other== * William Riley (architect) (1852–1937), British architect * William J. Riley (1947–2023), United States federal judge * William F. Riley (judge) (1884–1956), United States federal judge * William F. Riley (engineer) (1925–2000), American engineer and academic * William Harrison Riley (1835–1907), British socialist * William Bell Riley (1861–1947), American religious leader * William Riley (criminal), a.k.a. "Mush" Riley, American saloon keeper and underworld figure * William E. Riley (1897–1970), American general
==See also== * William Reilly (disambiguation) * Riley (surname) * William O'Reilly (disambiguation)
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