1 The prophetess of Cruachain in the Táin Bó Cuailnge [Cattle Raid of Cooley]. Her power of imbas forosnai allows her to tell Medb of Connacht that the foray into Ulster will end in defeat. In the Táin she is seen as an armed but beautiful blonde young woman riding in a chariot, with hair falling below her knees, gold-clasped sandals, and three irises in each eye. Patricia Lysaght (1986) has suggested that Fedelm anticipates the banshee of later folk tradition.
2 Mother of Brandub, the king of the Lagin.
3 Woman of the sídh in Munster who gave Corc mac Luightig, legendary founder of Cashel, his name. While the child Corc was in her care, Fedelm was at work at her magic when one of her sisters in sorcery called out, ‘I bless everything, except what's under the cauldron.’ This caused an explosion that singed Corc's ear, giving him his name. Although modern lexicographers gloss corc as ‘heart’, early Irish writers thought it meant ‘red’ or ‘crimson’.