Declan (or Deglan) (1)
was an Irish saint, who wrought with St. Virgilius, St. Rupert, and others in the evangelization of Bavaria, and died at Frisengen, December 1, about the middle of the 8th century; (2) bishop of Ardmor, was a son of Erc and Deitsin, or Dethidin. Through his father he could boast of royal ancestry. He was born at Decies, in the county of Waterford, and probably died about the middle of the 7th century. He is commemorated July 24.