Fergus mac Róich
Flidais is a central figure in "Táin Bó Flidhais" ("The Driving-off of Flidais's Cattle"), an Ulster Cycle work, where she is the lover of Fergus mac Róich and the owner of a magical herd of cattle. The story, set in Erris, County Mayo tells how Fergus carried her and her cattle away from her husband, Ailill Finn.