Clann Cosgraigh

Clann Cosgraigh was a branch of the Uí Briúin dynasty and also the name of the district on the eastern side of Lough Corrib, County Galway which they inhabited and ruled prior to the Norman invasion. 
Its chiefs were the Mac Aedha (now rendered McHugh), who, like the Muintir Murchada, claimed descent from Cenn Fáelad mac Colgan, King of Connacht. Early generations of the lineage competed with the Muintir Murchada and Uí Fiachrach Aidhne for the kingship of South Connacht.
In 1124 "Muireadhach (i.e. lord of Clann-Coscraigh), the son of Aedh, son of Ruaidhri, died an ecclesiastic."
In 1170, "Ruaidhri Mac Aedha, lord of Clann-Cosgraigh, died on his pilgrimage at Tuaim-da-ghualann."