Comman of Roscommon

Saint Comman of Roscommon (Commán mac Faelchon, that is, son of Faelchon) was an Irish saint, the founder, abbot and bishop of Roscommon, who flourished about 550. He was of the Cinel Domaingen, a branch of the Sogain of Connacht. He studied at the monastic school of Clonard in County Meath, where he became associated with Saint Finnian of Clonard.

After his studies, about 550, he founded a monastery on the east bank of the River Suck, at a wood (ros) that was to bear his name, Ros Comain. The place lay on Magh nAí, homeland of the Uí Briúin kings of Connacht, whose patronage he enjoyed. His successors are named in the annals between 782 and 1135. He is linked with the foundation of Kilcommon in County Mayo and of the early monastic church at Leithglinn in County Carlow. He composed a rule for monks, followed by many foundations in Connacht.

His feast is kept on 26 December (the date of the Irish calendars). He is a saint of the undivided Church, honoured locally, without synodal canonization.