Tuath-founder Cas was a foster-son of Ailill the Earless, and a kinsman of the Kingdom of Mercenaries. His descen- dants function as a western branch of the Mercenaries in many respects. Being crowded out of Sionnan callows by the Lochlannach of Limerick has recently fed their distrust of foreigners. Their prophet-goddess, Aoibheall, stirs them to insane recklessness with her promise of a future in which they destroy the Lochlannach and rule from Tara. Ruler: Chieftain. Vassal of: Eoghanacta of Aine; Geralds.