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.
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.
Géde Ollgothach, son of Ollom Fotla, was, according to medieval Irish legend and historical tradition, a High King of Ireland. He succeeded to the throne on the death of his brother Slánoll. His epithet means "possessing a great voice", and the Lebor Gabála Érenn says during his reign all his subjects had voices as sweet as the strings of a zither. He ruled for eight, or twelve, or seventeen years, before being killed by, according to the Lebor Gabála, the otherwise unknown Fíachu son of Fíadchú; according to Geoffrey Keating and the Annals of the Four Masters, by his nephew and successor Fíachu Findoilches, son of Fínnachta. The chronology of Keating's Foras Feasa ar Éirinn dates his reign to 880–863 BC, that of the Annals of the Four Masters to 1241–1231 BC.
Berngal, son of Géde Ollgothach, was, according to medieval Irish legend and historical tradition, a High King of Ireland. He took power after killing his predecessor and cousin and his father's killer, Fíachu Findoilches. He made so much war that there was a shortage of milk and corn - according to one version, only a sack and a half. He ruled for either twenty-one or twelve years, until he was killed by his cousin Ailill, son of Slánoll. The Lebor Gabála Érenn synchronises his reign with that of Deioces of the Medes. The chronology of Geoffrey Keating's Foras Feasa ar Éirinn dates his reign to 833–831 BC, that of the Annals of the Four Masters to 1209–1197 BC.
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.
Bres Rí, son of Art Imlech, was, according to medieval Irish legend and historical tradition, a High King of Ireland, who took power after killing his predecessor, and his father's killer, Nuadu Finn Fáil. He ruled for nine years, and fought many battles against the Fomorians, before he was killed at Carn Conluain by Eochu Apthach. The Lebor Gabála Érenn synchronises his reign with those of Nebuchadrezzar II of Babylon (605–562), Cambyses II of Persia, and Cyaxares of the Medes (625–585). The chronology of Geoffrey Keating's Foras Feasa ar Éirinn dates his reign to 735–726 BC, that of the Annals of the Four Masters to 962–953 BC.
Dui Finn, son of Sétna Innarraid, 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, Siomón Brecc. He ruled for ten years, before he was killed by Siomón's son Muiredach Bolgrach. The Lebor Gabála Érenn synchronises his reign with those of Xerxes I and Artaxerxes I of Persia. The chronology of Geoffrey Keating's Foras Feasa ar Éirinn dates his reign to 679–674 BCBC, that of the Annals of the Four Masters to 904–894 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.
Sírlám, son of Finn mac Blatha, was, according to medieval Irish legend and historical tradition, a High King of Ireland. He took power after killing his predecessor, Lugaid Íardonn, in Ráth Clochair. His name means "long hand" or "long arm", and it is said his arms reached the ground when was standing up. He ruled for thirteen years according to the Lebor Gabála Érenn, or sixteen according to Geoffrey Keating and the Four Masters. He drove Lugaid's son Eochu Uairches into exile, but after twelve years overseas Eochu returned and killed him with an arrow. 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 649–633 BC, that of the Annals of the Four Masters to 872–856 BC.
Conaing Begeclach was, according to medieval Irish legend and historical tradition, joint High King of Ireland with his brother or half-brother Eochu Fíadmuine. They took power after killing the previous High King, Eochu Uairches. Conaing ruled the northern half of Ireland, Eochu the south.
Art, son of Lugaid Lámderg, 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, Conaing Bececlach. He ruled for six years, until he was killed by Fíachu Tolgrach and his son Dui Ladrach. According to the Lebor Gabála Érenn, he was succeeded by his son Ailill Finn; Keating and the Four Masters agree he was succeeded by his killer, Fíachu Tolgrach, who was later killed by Ailill Finn. The Lebor Gabála synchronises his reign with that of Darius II of Persia (423–404). The chronology of Keating's Foras Feasa ar Éirinn dates his reign to 599–593 BC, that of the Annals of the Four Masters to 812–806 BC.
Fíachu Tolgrach, son of Muiredach Bolgrach, was a legendary High King of Ireland, according to some medieval and early modern Irish sources. In the Lebor Gabála Érenn he is not a High King: he kills the former High King Art mac Lugdach, but during the reign of Art's son Ailill Finn he is killed in battle against Airgetmar. His son Dui Ladrach later becomes High King. However, in Geoffrey Keating's Foras Feasa ar Éirinn and the Annals of the Four Masters he succeeds Art as High King and rules for seven or ten years, until he is killed by Ailill Finn, who succeeds him. The chronology of Keating's Foras Feasa ar Éirinn dates his reign to 593–586 BC, that of the Annals of the Four Masters to 806–796 BC.
Ailill Finn, son of Art mac Lugdach, was, according to medieval Irish legend and historical tradition, a High King of Ireland. In the Lebor Gabála Érenn, he succeeded to the throne when his father was killed by Fíachu Tolgrach and his son Dui Ladrach. He ruled for nine years. Two years into his reign, Fíachu Tolgrach was killed in battle against Airgetmar, son of Sírlám. The men of Munster, led by Ailill's son Eochu and Lugaid, son of Eochu Fíadmuine, then drove Airgetmar into exile overseas. After seven years Airgetmar returned to Ireland and killed Ailill with the help of Dui Ladrach and his son Fíachu, but was unable to seize the throne, which was taken by Eochu.
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.
Airgetmar, son of Sirlám, was, according to medieval Irish legend and historical tradition, a High King of Ireland. The Lebor Gabála Érenn says that, during the reign of Ailill Finn, he killed Fíachu Tolgrach in battle, but was forced into exile overseas by Ailill's son Eochu, Lugaid son of Eochu Fíadmuine, and the men of Munster. He returned to Ireland after seven years, and, with the help of Dui Ladrach, killed Ailill. Eochu became king, but Airgetmar and Dui soon killed him as well, and Airgetmar took power.
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.
Fer Corb, son of Mug Corb, 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, Irereo, in Ulster. He ruled for eleven years, until he was killed by Irereo's son Connla Cáem. The Lebor Gabála Érenn synchronises his reign with that of Ptolemy IV Philopator of Egypt. The chronology of Geoffrey Keating's Foras Feasa ar Éirinn dates his reign to 330–319 BC, the Annals of the Four Masters to 474–463 BC.
