John Brennan

• Coyote on a Fence
• J. J. Brennan
• Jack Brennan
• Jack Brennan (baseball)
• Jack Brennan (footballer, born 1892)
• John A. Brennan Jr.
• John Brenan (disambiguation)
• John Brennan (American football)
• John Brennan (Derry Gaelic footballer)
• John Brennan (Irish senator)
• John Brennan (Kerry Gaelic footballer)
• John Brennan (Vanguard CEO)
• John Brennan (athlete)
• John Brennan (doctor)
• John Brennan Hussey
• John Calder Brennan
• John Joseph Brennan
• John N. H. Brennan
• John O'Brennan
• John O. Brennan
• John P. Brennan
• John Wolf Brennan
• Johnny Brennan
• Sidney Czira