Dictionary of National Biography, 1885-1900/Jarlath (424-481)
JARLATH or IARLAITHE (424–481), Irish saint, third archbishop of Armagh, was born at Rath-trena in the east of Ulster. His father was named Trien, and was of the Dal Fiatach, the race of Fiatach the Fair, which furnished kings to Ulster for the seven hundred years preceding the Norman invasion. He was born a pagan, was baptised in childhood, administered the last sacrament to St. Benan, and after Benan's death became archbishop of Armagh in 464. He died on 11 Feb. 481.
[Colgan's Acta Sanctorum Hib.; Reeves's Antiquities of Down, Connor, and Dromore, p. 352; Annals of Ulster, ed. Hennessy, i. 25.]