Mac Cairthinn of Clogher

Saint Mac Cairthinn, also Macartan, McCartan (died 506), is recognized as the first presiding Bishop of Clogher from 454 to his death. One of the earliest Christian saints in Ireland, he is known as Saint Patrick's "Threin Fhir", or "Strong Man" for his dedication and faithfulness to the fledgling Church. His feast day is 24 March.