Born a Cornish prince, the son of King Paternus. After a life of vice, Constantine had a conversion experience, repented his sins, and studied the faith in Wales and Ireland. Missionary to the Scottish Picts. Worked with Saint Columbanus. Abbot of a monastery at Govan. Two places in Cornwall are named for him. Considered by some sources to be Scotland‘s first martyr.
- Book of Saints, by the Monks of Ramsgate
- Catholic Online
- Our Sunday Visitor’s Encyclopedia of Saints