The fifth area where the name originated is Tyrone; today Quinn is the most common surname in the county. The family were part of the Clann Feargusa, descendants of Fergus, grandson of Niall of the Nine Hostages, the fifth-century monarch who founded the dynasty of the Ui Neill. The individual from whom descent is claimed was Coinne, a grandson of Fergus. All of the Clann Feargusa were conspicuous In the fighting forces of the O'Neills, with the O Coinne traditionally acting as quartermasters.
Edel Quinn (1907-1944) was a missionary of the Legion of Mary in Africa, working in Kenya, Mauritius, Uganda and the then Tanganyika and Nyasaland, and renowned for her dedication in the face of poor health.
Feargal Quinn (1936 - ) is the owner of a supermarket chain and has become a national figure in Ireland due to his public service and his membership of the Senate, to which he was elected in 1993.
Ruari Quinn (1946 - ) is presently deputy leader of the Labour Party and Minister for Finance. He has previously served in four other ministries.
Aidan Quinn (1959 - ), a native of Belfast, is well known as a Hollywood actor, having appeared in such films as Desperately Seeking Susan (1985), The Mission (1986), and Legends of the Fall (1994).