Fintan Munnu

Holy Venerable Fintan Munnu was born in Ireland of the line of Niall and became abbot of Taghmon (Teach Munnu, "the house of Munnu") in County Wexford. He reposed in 635 or 636. In Scotland he is venerated as Mundus or Munn and counted patron of Clan Campbell. He is a saint of the undivided Church.

According to the oldest Lives, he studied eighteen years under the abbot Sinell at Cluain-⁠inis on Lough Erne. In 597, learning at Iona that Saint Columba had died, he asked to be received as a monk by Columba's successor, Saint Baithen. Baithen answered that Columba, in the spirit of prophecy, had foretold his coming and ordered that he return to Ireland and found a monastery in Leinster, near the sea. In Scotland he founded a community at Kilmun.

Back in Ireland, around 597 he received land from a lord in Wexford and set up Taghmon, which became a centre of learning with a hundred and fifty-⁠two monks. He is said to have been versed in science and to have given public lectures on the Christian mystery. Several accounts say he bore a severe skin disease with great patience. Late in life he first opposed the Roman reckoning of Easter; the synod of Magh Lene in 631 could not settle the matter, and after a delegation returned from Rome he too adopted the Roman reckoning, like the rest of southern Ireland. His bed at Taghmon is still a place of pilgrimage.

He is commemorated on 21 October, the liturgical date in the Orthodox calendar (the same day number on the old and new calendars).