June 4 -- Saint Petroc

St Petroc was a Welsh saint who studied in Ireland and became patron of Devon and one of the patrons of Cornwall. "Catholic Online" summarizes St Petroc thusly:

Petroc was born in Wales, possibly the son of a Welsh king. He became a monk and with some of his friends, went to Ireland to study. They immigrated to Cornwall in England and settled at Lanwethinoc (Padstow). After thirty years there, he made a pilgrimage to Rome and Jerusalem, at which time he is also reputed to have reached the Indian ocean where he lived for some time as a hermit on an island. He then returned to Cornwall, built a chapel at Little Petherick near Padstow, established a community of his followers, and then became a hermit at Bodmir Moor, where he again attracted followers and was known for his miracles. He died between Nanceventon and Lanwethinoc while visiting some of his disciples there. His feast day is June 4th.

You'll find a more devotional life, complete with the wonderful, extravagant details that our ancestors were so fond of, here. E.g.:

After 30 years as abbot, Petroc made a pilgrimage to Rome, Italy. On his return, just as he reached Newton Saint Petroc, it began to rain. Petroc predicted it would soon stop, but it rained for three days. In penance for presuming to predict God‘s weather, Petroc returned to Rome, then to Jerusalem, then to India where he lived seven years on an island in the Indian Ocean.

Petroc returned to Britain with a wolf companion he had met in India.