Catholic Encyclopedia (1913)/Sts. Kieran
There are many Irish saints of this name, but the most celebrated is St. Kieran of Clonmacnoise (see CLONMACNOISE). Of the others, St. Kieran of Seir-Kieran and St. Kieran of Disert-Kieran are the best known. The former is founder of Seir-Kieran, Kings County (about A.D. 450), and also of the See of Ossory (see OSSORY, DIOCESE OF). His history is obscure, but he flourished during the greater part of the fifth century, and is venerated in England, Brittany, Wales, and Scotland, on 5 March. St. Kieran of Disert-Kieran, Co. Meath, called by the Irish annalists "Kieran the Devout", wrote a "Life of St. Patrick." He died in 775 on 14 June, on which day his feast is celebrated. St. Kieran, patron of Clonsost, is commemorated on 30 April, and St. Kieran, son of Colga, on 19 May.
W. H. Grattan-Flood.