Mathias of Inis Ní, Medieval Irish saint.
Biography
Inis Ní (Inishnee Island) is located in Bertraghboy Bay in Connemara, Ireland, and contains the remains of a chapel and well dedicated to Mathias, the probable founder of the Christian settlement on the island. The chapel is surrounded by a rectangular graveyard, with an altar to the north-east containing an upright cross-inscribed slab.
References
Mathias of Inis Ní Wikipedia(Text) CC BY-SA