John Brenan

John Brenan may refer to:

• John Brenan (bishop) (died 1693), Irish Roman Catholic archbishop
• Ryan Brenan (John Ryan Brenan, 1798–1868), Australian politician
• John Brenan (physician) (1768–1830), Irish physician
• John Fitzgerald Brenan (1883–1953), British diplomat in China
• John Patrick Micklethwait Brenan (1917–1985), British botanist

• John Brennan (disambiguation)
• Michael John Brenan (1780–1847), Roman Catholic priest and ecclesiastical historian