In Irish mythology Eithrial son of of Irial Fáith succeeded his father as High King of Ireland. In his time twenty plains were cleared. He ruled for twenty years, until he was killed by Conmael, son of Eber Finn. Although many of the manuscripts containing texts relating to Irish mythology have failed to survive, and much more material was probably never committed to writing, there is enough remaining to enable the identification of four distinct, if overlapping, cycles: the Mythological Cycle, The Ulster Cycle, the Fenian Cycle and the... The office of High King of Ireland (Irish: Ard Rí Érenn) was in origin a pseudohistorial construct of the eighth century that placed a king of all Ireland atop the fragmented pyramid of kingship that actually existed at that time. ... In Irish mythology Conmael son of Eber Finn became High King of Ireland when he overthrew Eithrial. ... In Irish mythology Eber Finn (Heber, Eibhear) was a son of Míl Espáine who participated in the Milesian conquest of Ireland. ...

The High Kingship of Ireland was a pseudohistorical construct of the eighth century AD, a projection into the distant past of a political entity that did not become reality until the ninth century. ... Signature page from the Annals of the Four Masters Entry for A.D. 432 The Annals of the Four Masters or the Annals of the Kingdom of Ireland by the Four Masters are a chronicle of medieval Irish history. ... Seathrún Céitinn, known in English as Geoffrey Keating, was a 17th century Irish clergyman, poet and historian. ... In Irish mythology Conmael son of Eber Finn became High King of Ireland when he overthrew Eithrial. ...