(Irish: Mícheál Dónall Ó Briaoin;11 August 1894 - 27 December 1969) was a volunteer in the Irish Republican Army, With Sean Treacy was very active during the war of Independence. He later took the anti-Treaty side and served as a Fianna Fáil politician for 37years.

Burial: Donohill, Co. Tipperary.