The dispossessed remnant of the Eóghanacht of Cashel migrated westwards and by the reign of Muiredach son of Cárthach, they may have occupied some location in the Emly-Duhallow district.
Dissension between him and his brother, Diarmaid, Dux of Cork, was exacerbated by hostilities from other major Irish kingdoms such as Connacht, Aileach and Leinster.
News of the defeat roused Muirchertach from his retirement, regaining the kingship of Munster and led a large army south, accompanied by his allies, the kings of Connacht, Mide, and Breifne.
With Munster divided into two separate kingdoms, Toirdelbach became the only contender for High King of Ireland, a position he held with opposition till his death in 1156.
In 1125 Mac Carthaigh seized the city of Limerick from Ua Briain, an act which was seen as symbolically assuming the kingship of all Munster.
The following year the Ard Rí attacked and decisively defeated Mac Carthaigh at his military encampment in Osraige.
Donnchadh submitted to Ua Conchobair after the siege of Cork city on Saint Brigid's Day 1127, along with O'Mahony, O'Donoghue, O'Keef, O'Bric, O Conchobhair Ciarraige.