Date börse Münster
Cian, the son of his brother Mathgamain's sworn enemy Máel Muad, later became a loyal ally of Brian and served under him in a number of campaigns.Having established unchallenged rule over his home Province of Munster, Brian turned to extending his authority over the neighboring provinces of Leinster to the east and Connacht to the north.
Cennétig was described as rígdamna Caisil, meaning that he was either heir or candidate ("king material") to the kingship of Cashel or Munster, When their father died, the kingship of Tuadmumu passed to Brian's older brother, Mathgamain, and, when Mathgamain was killed in 976, Brian replaced him.Brian belonged to the Dál g Cais (or Dalcassians), a newly styled kin group of ultimately Déisi origin who occupied a territory north of the Shannon Estuary, which today would incorporate a substantial part of County Clare and then formed the core of the new kingdom of Thomond.In earlier times their ancestors had controlled some lands in today's County Limerick as well, but these had been overrun by the Uí Fidgenti from the 9th century and the invading Norse in the 10th. 941 – 23 April 1014) was an Irish king who ended the domination of the High Kingship of Ireland by the Uí Néill.Building on the achievements of his father, Cennétig mac Lorcain, and especially his elder brother, Mathgamain, Brian first made himself King of Munster, then subjugated Leinster, eventually becoming King of Ireland. With a population of under 500,000 people, Ireland had over 150 kings, with greater or lesser domains.
The Uí Néill king Máel Sechnaill mac Domnaill, abandoned by his northern kinsmen of the Cenél n Eógain and Cenél Conaill, acknowledged Brian as High King at Athlone in 1002.