Byrne goes to say that the Gailenga and Luigni were closely associated as neighbours and allies in Connacht, situated south of the Ox Mountains they formed a large block between the northern Ui Fiachrach and the Ui Briuin. They themselves dominated smaller tribes, and have some claim to be considered an over-kingdom, as recognised in the twelfth century when their lands were absorbed into the diocese of Achonry. Their ruling families of O'Gara and O'Hara remained prominent well into the seventeenth century. The baronies of Gallen in Mayo and Leyney in Sligo, along with Corrand and Coolavin in the Curlew Mountains, lloming over the fertile plain of Moylurg, into which the Ui Briuin Ai were to expand, were crowded with small tribes, some of whom are intimately connected with the origin legends of the Connachta. (p.233)