title: Donal O'Brien
text: # Donal O'Brien
  
  Donal O'Brien may refer to:
  
  * Domnall Mór Ua Briain (died 1194), king of Munster
  * Donal O'Brien (hurler) (1940–2012), Irish hurler
  * Donald O'Brien (actor) (1933), French-born Irish film and television actor
  