What is "mairtine"

The Mairtine (Martini, Marthene, Muirtine, Maidirdine, Mhairtine) were an important people of late prehistoric Munster, Ireland who by early historical times appear to have completely vanished from the Irish political landscape. They are notable for their former capital, Medón Mairtine, becoming the chief church of the later Eóganachta, namely Emly.