William, Will, Willie, or Bill Wynn or Wynne may refer to:
Law and politics William Wynne (lawyer) (c. 1692–1765), Welsh lawyer and historian William Wynne (judge) (1729–1815), English judge and academic William Wynne (Irish politician) (c 1764–1855), Irish politician, MP for Sligo Borough William Watkin Edward Wynne (1801–1880), Welsh politician, MP for Merionethshire William J. Wynn (1860–1935), US Representative from California W. R. M. Wynne (William Robert Maurice Wynne, died 1909), Welsh politician, MP for Merionethshire Will Wynn (born 1961), American politician in Austin, Texas
Sports Bill Wynne (1869–1951), American baseball pitcher William Wynn (footballer) (1876–1944), Welsh international footballer Willie Wynn (1917–1992), American baseball player Will Wynn (American football) (born 1949), American football defensive end William Wynne (hurdler) (born 1990), American hurdler
Others William Wynne (historian) (c. 1671–1704), Welsh priest and historian William Wynn (poet) (c. 1709–1760), Welsh priest and poet Bill Wynne (1922–2021), American dog trainer and photojournalist William H. Wynn (1932–2002), American trade unionist
Other uses Williams-Wynn baronets, English baronetcy
See also Billy Wynne (disambiguation) William Winn (1945–2006), American educational psychologist