Brian O'Brien

Last updated June 15, 2025

Brian O'Brien may refer to:

Brian O'Brien (optical physicist) (1898–1992), American optical physicist and the founder of the Air Force Studies Board
Brian O'Brien (space scientist) (1934–2020), Australian physicist and space scientist
Brian O'Brien (rugby union) (1939–2023), Irish rugby union player and coach

Clock (character), a fictional crime-figher whose alter ego is Brian O'Brien

See also

Brian O'Brian, an Italian-American series of television shorts

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