Ailill Caisfiaclach son of Connla Cáem

Connla Cáem

Connla Cáem , also known as Connla Cruaidchelgach , son of Irereo, was, according to medieval Irish legend and historical tradition, a High King of Ireland. He came to power after he killed his predecessor, and his father's killer, Fer Corb, and ruled for four years, until he died in Tara, and was...

, was, according to medieval Irish legends and historical traditions, a High King of Ireland

High King of Ireland

The High Kings of Ireland were sometimes historical and sometimes legendary figures who had, or who are claimed to have had, lordship over the whole of Ireland. Medieval and early modern Irish literature portrays an almost unbroken sequence of High Kings, ruling from Tara over a hierarchy of...

. He succeeded his father, and reigned for twenty-five years, until he was killed by Adamair

Adamair

Adamair , son of Fer Corb, was, according to medieval Irish legends and historical traditions, a High King of Ireland. He came from Munster, killed the previous incumbent, Ailill Caisfhiaclach, and reigned for five years, until he was killed by Eochaid Ailtleathan...

. The Lebor Gabála Érenn

Lebor Gabála Érenn

Lebor Gabála Érenn is the Middle Irish title of a loose collection of poems and prose narratives recounting the mythical origins and history of the Irish from the creation of the world down to the Middle Ages...

synchronises his reign with that of Ptolemy V Epiphanes

Ptolemy V Epiphanes

Ptolemy V Epiphanes , son of Ptolemy IV Philopator and Arsinoe III of Egypt, was the fifth ruler of the Ptolemaic dynasty. He became ruler at the age of five, and under a series of regents the kingdom was paralyzed.-Regency infighting:Ptolemy Epiphanes was only a small boy when his father, Ptolemy...

 in Egypt (204-181 BC). Geoffrey Keating

Geoffrey Keating

Seathrún Céitinn, known in English as Geoffrey Keating, was a 17th century Irish Roman Catholic priest, poet and historian. He was born in County Tipperary c. 1569, and died c. 1644...

's Foras Feasa ar Éirinn dates his reign from 315 to 290 BC, the Annals of the Four Masters

Annals of the Four Masters

The Annals of the Kingdom of Ireland or the Annals of the Four Masters are a chronicle of medieval Irish history...

from 443 to 418 BC.