Wikipedia
Caillín
Saint Caillin (fl. c. 560) was an Irish medieval saint and monastic founder. His Feast day is celebrated on November 13. 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).