Cathal mac Finguine (died 742) was an Irish King of Munster or Cashel, and effectively High King of Ireland as well. He belonged to the Eóganacht Glendamnach sept of the dominant Eóganachta kin-group whose members dominated Munster from the 7th century to the 10th. His father, uncle, grandfather and great-grandfather had also been kings of Cashel, as were his son and grandson.
Cathal's conflict with the Uí Néill kings, Fergal mac Máele Dúin, Flaithbertach mac Loingsig, and Áed Allán, son of Fergal mac Máele Dúin, is reported at some length in the Irish annals, and again northern and southern versions provide differing accounts. Cathal also appears as a character, not always portrayed sympathetically as in Aislinge Meic Con Glinne where he is possessed by a demon of gluttony, in a number of prose and verse tales in the Middle Irish language.
Widely regarded as the most powerful Irish king of the first half of the 8th century, and the strongest (historical) king from Munster before Brian Bóruma,[1] Cathal mac Finguine is believed to be the last king mentioned in the Baile Chuinn Chétchathaig.[2] The most expansionist historical Eóganacht king before him was Faílbe Flann mac Áedo Duib (d. 639).