People of what is now south-western Co. Cork, who lived between the River Bandon and the sea in the southernmost area in Ireland. The ancient geographer Ptolemy (2nd cent. ad) may have identified the Corcu Loígde with the people he named Iverni. They were a dominant power in south Munster before the rise of the Eóganacht. In the pseudo-history Lebor Gabála [Book of Invasions], they are described as descending from Lugaid son of Dáire and thus from Ith.