http://worldconnect.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db...

Oilill Oluim OF MUNSTER

• •ID: I11470
• •Name: Oilill Oluim OF MUNSTER
• •Given Name: Oilill Oluim
• •Surname: of Munster
• •Sex: M 1
• Father: Mogha Nuadhait (Owen Mor) OF MUNSTER
• Mother: Beara OF SPAIN (CASTILE)
• Marriage 1 Sabina OF IRELAND
• •Married:
• Children

1. Cormac Cais OF MUNSTER

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ http://www.libraryireland.com/Pedigrees1/Heber.php

Olioll Olum: son of Eoghan Mor; was the first of this line named in the Regal Roll to be king of both Munsters; for, before him, there were two septs that were alternately kings of Munster, until this Olioll married Sabina, daughter of the Monarch Conn of the Hundred Battles, and widow of Mac Niadh, chief of the other sept of Darin, descended from Ithe, and by whom she had one son named Lughaidh, commonly called "Luy Maccon;" who, when he came to man's age, demanded from Olioll, his stepfather, the benefit of the agreement formerly made between their ancestors; which Olioll not only refused to grant, but he also banished Maccon out of Ireland; who retired into Scotland, where, among his many friends and relations, he soon collected a strong party, returned with them to Ireland, and with the help and assistance of the rest of his sept who joined with them, he made war upon Olioll; to whose assistance his (Olioll's) brother-in-law, Art-Ean-Fhear, then Monarch of Ireland, came with a good army; between whom and Maccon was fought the great and memorable battle of Magh Mucromha (or Muckrove), near Athenry, where the Monarch Art, together with seven of Olioll's nine sons, by Sabina, lost their lives, and their army was totally defeated and routed. By this great victory Maccon not only recovered his right to the Kingdom of Munster, but the Monarchy also, wherein he maintained himself for thirty years; leaving the Kingdom of Munster to his stepfather Olioll Olum, undisturbed.

After the battle, Olioll, having but two sons left alive, namely Cormac-Cas and Cian, and being very old, settled his kingdom upon Cormac, the elder son of the two, and his posterity; but soon after being informed that Owen Mór, his eldest son (who was slain in the battle of Magh Mucromha, above mentioned), had by a Druid's daughter issue, named Feach (Fiacha Maolleathan as he was called), born after his father's death, Olioll ordained that Cormac should be king during his life, and Feach to succeed him, and after him Cormac's son, and their posterity to continue so by turns; which (arrangement) was observed between them for many generations, sometimes dividing the kingdom between them, by the name of South, or North Munster, or Desmond, and Thomond.

From these three sons of Olioll Olum are descended the Hiberian nobility and gentry of Munster and other parts of Ireland; viz., from Owen Mór are descended M'Carthy, O'Sullivan, O'Keeffe, and the rest of the ancient nobility of Desmond; from Cormac-Cas are descended O'Brien, MacMahon, O'Kennedy, and the rest of the nobility and gentry of Thomond; and from Cian [Kian] are descended O'Carroll (of Ely-O'Carroll), O'Meagher, O'Hara, O'Gara, etc.