Mainchín of Limerick

Mainchín mac Setnai (fl. late 6th century), also anglicised to Munchin, was allegedly the founder of the church of Luimneach (now Limerick), Ireland, and a saint in Irish tradition, acquiring special eminence as patron of Limerick City. Both his origins and the date of his association with the city are debated.

Background Through his father Sétna, Mainchín is alleged to belong to the Dál Cais, given a pedigree linking him to the ancestors of the O'Brien dynasty. His tutor was the Corco Mruad saint Mac Creiche according to the Life of that saint.

In fact, no "successors" of Mainchín in Limerick are known before the 12th century and so his existence there cannot be verified before then.

In the Martyrology of Donegal, Mainchín's feast day occurs on 29 December. In Bruree, his feast day is commemorated on 2 January, but this date may have been erroneously taken from that recorded for St Manchán (Manchéne) of Min Droichit in the Félire Óengusso.