St. Fintan was the Abbot and Founder of Clonenagh in Leinster, known for the austeriry of his rule. He was a disciple of St. Columba and his legend speaks of him as a wonder worker with clairvoyance, prophecy, and miracles. Fintan was the teache of Comgall who in turn taught Columban.
He died in 603.
FROM THE WEB SITE OF THE DOON HISTORICAL AND LITERARY SOCIETY:
St. Comgall, Abbot of Bangor had founded a school at Bangor in the middle of the 6th century and it was here that St. Fintan studied. At this time pirates raided these monasteries frequently. St. Fintan, once, asked Finian of Maghbile to loan him a Gospel for his studies but was refused. The next night St. Fintan and his companions were on guard at the port, fearing an invasion. The pirates, however, firstly raided Magh Bile - the monastery of St. Finian and among the treasures they stole was the Gospel. Later they approached Bangor where St. Fintan was on guard. When they were about to attack the city a storm suddenly arose and all the ships were sank except that which carried the Gospel. The Gospel, along with other artefacts were recovered.
One Spring a leper came to St. Fintan and requested some bread, made from newly ripened corn. St. Fintan instructed the leper to plant a seed in the newly ploughed field. The seed immediately grew and ripened and thus the leper was satisfied.
At this time a pagon king lived in a district called Calathmagh. On hearing of St. Fintan's approach the king instructed his servants to prevent the further progress of St. Fintan. On reaching a field where the king's workers were, the saint and his followers were obstructed from continuing. On requesting permission they were insulted. Presently a storm arose and the crops were set on fire from which the smoke almost blinded the kings employees. With some blessed water St. Fintan restored their vision and they were deeply grateful to him.
Sources:
Doon Bleisce Web Site: St. Fintan