Fachtna Fáthach, son of Cas, son of Rudraige, was, according to medieval Irish legend and historical tradition, a High King of Ireland. He came to power when he defeated the previous High King, Dui Dallta Dedad, in the battle of Árd Brestine. According to some stories he was the lover of Ness, daughter of Eochaid Sálbuide, king of Ulster, and the father of her son, Conchobar mac Nessa, the king of Ulster in the stories of the Ulster Cycle.
Eochaid or Eochu Étgudach or Etgedach ("negligent"?), son of Daire Doimthech, son of Conghal, son of Eadaman, son of Mal, son of Lugaid, son of Íth, son of Breogán, was, according to medieval Irish legend and historical tradition, a High King of Ireland. According to the Lebor Gabála Érenn he was chosen as king by the remaining quarter of the men of Ireland after the other three-quarters had died with the former king, Tigernmas, while worshipping the deity Crom Cruach. He introduced a system whereby the number of colours a man could wear in his clothes depended on his social rank, from one colour for a slave to seven for a king or queen. He ruled for four years, until he was killed in battle at Tara by Cermna Finn, who succeeded to the throne jointly with his brother Sobairce. His reign is synchronised with that of Eupales in Assyria. The chronology of Geoffrey Keating's Foras Feasa ar Éirinn dates his reign to 1159–1155 BC, that of the Annals of the Four Masters to 1537–1533 BC.
Sobairce, son of Ebric and a great great grandson of Míl Espáine, was, according to medieval Irish legend and historical tradition, joint High King of Ireland with his brother Cermna Finn. The pair came to power after Cermna killed the previous incumbent, Eochaid Étgudach, in battle at Tara. They were the first High Kings to come from the Ulaid. They divided the country between them, the border running from Drogheda to Limerick. Sobairce ruled the northern half from Dún Sobairce, Cermna the southern half from Dún Cermna. They ruled for forty years. Sobairce died at the hands of Eochaid Menn, son of the king of the Fomorians. Cermna was killed in the same year by Eochaid Faebar Glas, son of the previous High King Conmáel, in the battle of Dún Cermna. The Lebor Gabála Érenn synchronises their reign with those of Laosthenes in Assyria and Rehoboam in Judah. The chronology of Geoffrey Keating's Foras Feasa ar Éirinn dates their reign to 1155–1115 BC, that of the Annals of the Four Masters to 1533–1493 BC.
Cermna Finn, son of Ebric and a great, great grandson of Míl Espáine, was, according to medieval Irish legend and historical tradition, joint High King of Ireland with his brother Sobairce.
Fíachu Labhrainne, son of Smirgoll, son of Enboth, son of Tigernmas, was, according to medieval Irish legend and historical tradition, a High King of Ireland. He came to power by killing the previous incumbent, Eochaid Faebar Glas, in the battle of Carman, in vengeance for his father, who had been killed by Eochaid in the battle of Druimm Liatháin. He was named after the river Labrainn, which burst from the ground during his reign. He fought a sea battle against the descendants of Éber Finn, and fought a battle against the Érainn at Mag Genainn in County Fermanagh, which resulted in Loch Erne bursting from the ground. In another battle he killed Eochaid's son Mofebis. Mofebis's son Eochu Mumu killed him in vengeance in the battle of Sliab Belgatain. Geoffrey Keating adds that during his reign, his son Aengus Olmucada conquered Scotland. The Lebor Gabála Érenn synchronises his reign with those of Piritiades and Ofratalus in Assyria. The chronology of Keating's Foras Feasa ar Éirinn dates his reign to 1095–1071 BC, that of the Annals of the Four Masters to 1473–1449 BC.
Eochu Mumu, son of Mofebis, son of Eochaid Faebar Glas, was, according to medieval Irish legend and historical tradition, a High King of Ireland. According to the Lebor Gabála Érenn he came to power after killing the previous incumbent, Fíachu Labrainne, who had killed his father in battle. The province of Munster is named after him. He ruled for 21 years, fighting many battles against the descendants of Érimón, before he was killed by Fíachu's son Óengus Olmucaid in the battle of Clíu. He would later be avenged by his own son Enna Airgdech.
Ailill, son of Slánoll, was, according to medieval Irish legend and historical tradition, a High King of Ireland; scholars now believe these kings to be a pseudohistorical construct of the eighth century AD, a projection into the distant past of a political entity which did not become a reality till Maelseachlainn I. He took power after killing his cousin Berngal. He ruled for twelve, fifteen or sixteen years, according to various versions of the Lebor Gabála Érenn before he was killed by Sírna Sáeglach, a great grandson of Rothechtaid mac Main. The Lebor Gabála synchronises his reign with that of Deioces of the Medes. The chronology of Keating's Foras Feasa ar Éirinn dates his reign to 831–815 BC, that of the Annals of the Four Masters to 1197–1181 BC.
Nuadu Finn Fáil, son of Gíallchad, was, according to medieval Irish legend and historical tradition, a High King of Ireland, who took power after he killed his predecessor, and his father's killer, Art Imlech. The Lebor Gabála Érenn says he ruled for either sixty or forty years before being killed by Art's son Bres Rí. The Lebor Gabála synchronises his reign with that of Cyaxares of the Medes. The chronology of Keating's Foras Feasa ar Éirinn dates his reign to 755–735 BC, that of the Annals of the Four Masters to 1002–962 BC. His son was Áedan Glas, whose son was Siomón Brecc mac Aedan. In turn, Siomón's son was Muiredach Bolgrach.
EochuApthach of the Corcu Loígde of County Cork, a distant descendant of Breogán, the father of Míl Espáine, was, according to medieval Irish legend and historical tradition, a High King of Ireland. He took power after killing the previous incumbent, Bres Rí. He only ruled for a year, and it is said there was a plague every month during that year. He was killed by Finn mac Blatha, a descendant of Ollom Fotla. The Lebor Gabála Érenn synchronises his reign with that of Darius the Great of Persia. The chronology of Geoffrey Keating's Foras Feasa ar Éirinn dates his reign to 726–725 BC, that of the Annals of the Four Masters to 953–952 BC.
Muiredach Bolgrach, son of Siomón Brecc, was, according to medieval Irish legend and historical tradition, a High King of Ireland. He took power after killing his predecessor, and his father's killer, Dui Finn, ruled for 13 months or four years depending on the source consulted, and was then killed by Dui's son Énna Derg. The Lebor Gabála Érenn synchronises his reign with that of Artaxerxes I of Persia. The chronology of Geoffrey Keating's Foras Feasa ar Éirinn dates his reign to 674–670 BC, that of the Annals of the Four Masters to 894–893 BC. His son was Fíachu Tolgrach.
EochuUairches, son of Lugaid Íardonn, was, according to medieval Irish legend and historical tradition, a High King of Ireland. After Lugaid was overthrown and killed by Sírlám, Eochu was driven into exile overseas, but he returned after twelve years, killed Sírlám with an arrow, and took the throne. His epithet is obscure: the Lebor Gabála Érenn says he gained it because of his exile, while Geoffrey Keating explains it as meaning "bare canoes", because he had canoes for a fleet, in which he and his followers used to plunder neighbouring countries. He ruled for twelve years, before he was killed by Eochu Fíadmuine and Conaing Bececlach. The Lebor Gabála synchronises his reign with that of Artaxerxes I of Persia. The chronology of Keating's Foras Feasa ar Éirinn dates his reign to 633–621 BC, that of the Annals of the Four Masters to 856–844 BC.
Lugaid Lámderg, son of Eochaid Uaircheas, was, according to medieval Irish legend and historical tradition, a High King of Ireland. The Lebor Gabála Érenn says he reigned jointly with Conaing Bececlach, ruling the southern half of the island while Conaing ruled the north, after he killed the previous southern ruler, Conaing's brother Eochu Fíadmuine, while Keating and the Four Masters say he deposed Conaing when he killed Eochu and ruled the whole island. He ruled for seven years, after which Conaing killed him and became High King of the whole island. The Lebor Gabála synchronises Lugaid's reign with those of Artaxerxes I and Darius II (423–404) of Persia. The chronology of Keating's Foras Feasa ar Éirinn dates his career to 616–609 BC, that of the Annals of the Four Masters to 839–832 BC.
Eochu, son of Ailill Finn, was, according to medieval Irish legend and historical tradition, a High King of Ireland. He succeeded to the throne after his father was killed by Airgetmar and his ally Dui Ladrach. According to the Lebor Gabála Érenn, he was himself killed by Airgetmar and Dui. Geoffrey Keating says he ruled for seven years, resisted Airgetmar and made peace with Dui, who killed him treacherously at a meeting, allowing Airgetmar to take the kingship. The Lebor Gabála synchronises his reign with that of Artaxerxes II of Persia (404–358 BC). The chronology of Keating's Foras Feasa ar Éirinn dates his reign to 577–570 BC, that of the Annals of the Four Masters to 785–778 BC.
Óengus Ollom, according to medieval Irish legend and historical tradition, was a High King of Ireland who was the son of Ailill, the son of Labraid Loingsech. He took power after he killed the previous incumbent, Mug Corb, and ruled for eighteen years, until he was killed by Irereo, son of Meilge Molbthach. The Lebor Gabála Érenn synchronizes his reign with that of Ptolemy III Euergetes of Egypt (246–222 BC). The chronology of Geoffrey Keating's Foras Feasa ar Éirinn dates his reign to 355–337 BC, the Annals of the Four Masters to 499–481 BC.
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 synchronises his reign with that of Ptolemy V Epiphanes in Egypt. The chronology of the Annals of the Four Masters dates his reign to 418–414 BC, the chronology of Geoffrey Keating's Foras Feasa ar Éirinn to 290–285 BC. He was the husband of the presumed goddess Flidais of the Tuatha Dé Danann.
EochaidAiltlethan, son of Ailill Caisfiaclach, was, according to medieval Irish legends and historical traditions, a High King of Ireland. According to the Lebor Gabála Érenn, he took the throne after overthrowing and killing the previous incumbent, Adamair, and ruled for eleven years, until he was killed in battle by Fergus Fortamail. The Lebor Gabála Érenn synchronises his reign with that of Ptolemy V Epiphanes in Egypt. The chronology of Geoffrey Keating's Foras Feasa ar Éirinn dates his reign to 285–274 BC, that of the Annals of the Four Masters to 414–396 BC.
Fergus Fortamail, son of Bresal Brecc, son of Óengus Ollom, son of Ailill Bracan, son of Labraid Loingsech, was, according to medieval Irish legend and historical tradition, a High King of Ireland. He took power after killing the previous incumbent, Eochaid Ailtlethan, in battle, and ruled for either eleven, twelve or twelve and a half years, until he was killed by Eochaid's son Óengus Tuirmech Temrach in battle at Tara. The Lebor Gabála Érenn synchronises his reign with that of Ptolemy VI Philometor in Egypt. The chronology of Geoffrey Keating's Foras Feasa ar Éirinn dates his reign to 274–262 BC, that of the Annals of the Four Masters to 396–385 BC.
Óengus Tuirmech Temrach, son of Eochaid Ailtlethan, was, according to medieval Irish legend and historical tradition, a High King of Ireland. He came to power after killing his predecessor, and his father's killer, Fergus Fortamail. His sons included Énna Aignech and Fiacha Fer Mara. Énna later became High King himself and was the ancestor of Conn of the Hundred Battles and thus the Connachta and Uí Néill High Kings, while Fiacha was the ancestor of Ailill Érann and the Clanna Dedad.
Conall Collamrach, son of Eterscél Temrach, son of Eochaid Ailtlethan, was, according to medieval Irish legend and historical tradition, a High King of Ireland. He succeeded to the throne on the death of his uncle Óengus Tuirmech Temrach, and ruled for five years, until he was killed by Nia Segamain. The Lebor Gabála synchronises his reign with that of Ptolemy VIII Physcon in Egypt. The chronology of Geoffrey Keating's Foras Feasa ar Éirinn dates his reign to 232–226 BC, that of the Annals of the Four Masters to 326–320 BC.
Énna Aignech, son of Óengus Tuirmech Temrach, was, according to medieval Irish legend, a High King of Ireland. He took power after killing his predecessor, and relative's killer, Nia Segamain, and ruled for twenty or twenty-eight years, after which he was killed by Crimthann Coscrach, the grandson of the man who had killed Énna's grandfather, in the Battle of Ard Crimthainn. Crimthann was killed by Rudraige mac Sithrigi, the great-grandson of the killer of one of Énna's ancestors. The Lebor Gabála Érenn synchronises his reign with that of Ptolemy VIII Physcon in Egypt. The chronology of Geoffrey Keating's Foras Feasa ar Éirinn dates his reign to 219–191 BC, that of the Annals of the Four Masters to 313–293 BC.
