William Brennan

• Bill Brennan (activist)
• Bill Brennan (boxer)
• Bill Brennan (journalist)
• Bill Brennan (umpire)
• Billy Brennan
• William Brennan (Australian politician)
• William Brennan (baseball)
• William C. Brennan
• William J. Brennan Jr.
• William John Brennan
• William Joseph Brennan (bishop)
• Willis Brennan
• Willy Brennan