Caillín

Saint Caillin (fl. c.570) was an Irish medieval saint and monastic founder. His Feast day is celebrated on 13 November. The patron saint of Fenagh, County Leitrim, Caillin was born in the 6th century and founded a monastic settlement at Fenagh. His history was given in the Old Book of Fenagh (no longer extant; material included in the Book of Fenagh). The Annals of the Four Masters mention of him living in 464 is based on the very late unreliable 16th century Book of Fenagh. All his siblings lived in the second half of the 6th century so it is likely Caillín lived at the same time. This date is also supported by his position in the Irish genealogies and by the Life of Saint Mogue (born c.560), who was taught by Caillín.