(Lat. Beda or Beatus), bishop of Ardcarna, in Roscommon, was the son of Olcan, of the race of Lugaidh. He was a disciple of St. Patrick; being possibly the St. Beatus, bishop of Duncruithen, of whom St. Evinus writes in his Tripartite Life of St. Patrick. He died March 8, 524, and his bell "Ceolan-Beoaidh," covered with gems and kept in a silver case, is said to have been preserved as a relic in the Church of Bailenag Cleirach. See Colgan, Acta Sanctorumn, p. 562-63, and Tr. Thaune. p. 156, c. 32; Kelly, Cal. of Ir. Saints, p. 89; O'Connor, Rer. Hib. Script. ii, 130; O'Donovan, Four Masters, i, 170, 171.