Conor na Siudane Ua Briain


Conor na Siudane Ua Briain also known as Conor Roe Ua Briain was a King of Thomond, in medieval Ireland. He was the son of Donnchadh Cairbreach Ó Briain.
Conor was killed in battle in 1267-8 when he invaded the Corcomroe and Burren districts to enforce his authority among some rebellious local chiefs, who encountered him at a place called “Siudaine,” near Bealaclugga, close to the abbey, and defeated and slew him. The “Annals of the Four Masters” thus note his death:—
“The age of Christ, 1268. Conor Roe O’Brien, Lord of Thomond, Seoinin, his son, his daughter, his daughter’s son, i.e., the son of Rory O’Grady, Duvloughlin O’Loughlin, Thomas O’Beollan, and a number of others, were slain by Dermot, the son of Murtough O’Brien, for which he himself was afterwards killed; and Brian, the son of Conor O’Brien, then assumed the lordship of Thomond.”

He was buried in the nearby Corcomroe Abbey where an effigy of him is present.
On his death in 1268 he was succeeded by his son Brian Ruadh Ó Briain. His eldest son Tadhg Cael Uisce had pre-deceased him in 1259. A feud which was fostered by the Norman de Clares emerged between the descendants of Tadhg and Brian over the kingship of Thomond and lasted until the 14th century with the senior Clann Tadhg eventually being victorious.

Family and issue [John O'Hart],"Irish Pedigrees or the Origin and Stem of the Irish Nation", Volume 1, 1892, p.159, https://archive.org/stream/irishpedigreesor_01ohar#page/158

He married Mór, daughter of McNamara, Lord of Uí Coileann and had issue: