Cormac mac Cuilennáin

Cormac mac Cuilennáin (fl. 905), a saintly King of Munster, scholar, and the reputed author of Sanas Chormaic (Cormac's Glossary) and the Psalter of Cashel, a lost text. He reigned AD 901-8 at Cashel, inaugurating a time of peace and plenty but also taking hostages from the Connachta and, according to the Annals of Inisfallen, from the Uí Néill. After his death he came to be regarded as a saint. He is said to have married Gormfhlaith, daughter of the High King Flann Sinna, only to divorce her to enter the Church.

Late 9th-century (d. 908) scholar and king-bishop of Cashel who is said to have compiled Sanas Cormaic [Cormac's Glossary]. Although Cormac could be an uncritical euhemerist, believing that all characters were historical, his Glossary is an invaluable source of information on early Irish tradition.