title: William Duffy
text: # William Duffy
  
  William Duffy, Bill Duffy or Billy Duffy may refer to:
  
  * Bill Duffy (basketball), American basketball player and player agent
  * Bill Duffy (sportsman) (1866–1959), Australian sportsman
  * Billy Duffy (born 1961), English musician
  * Billy Duffy (hurler) (1931–2005), Irish hurler
  * William Duffy, a pseudonym of William Dufris (1958–2020), an American voice actor
  * William Duffy (bishop), English Roman Catholic bishop
  * William Duffy (politician) (1865–1945), Irish nationalist politician
  * William James Duffy (1888–1946), Canadian politician
  * William J. Duffy (1916–2013), American jurist and legislator
  