Saint Caluppanus
From BiblePortal Wikipedia
Saint Caluppanus [1]
was born in 527, and spent his early years in the monastery of India, where he so abstained from food as to be unable to perform his share of the ordinary work of the establishment. The other monks reproached him, and he withdrew to a neighboring cave, where he built himself an oratory. He occupied himself entirely with study and prayer, and is said to have vanquished persecuting evils spirits by using the sign of the cross and the Lord's Prayer. St. Avitus visited him at his cave, and ordained him deacon and priest. He died in 576. See Aca Sanctorunm Boll. March, i, 262.