Cadoc was the son of King Gwynllwwg in South
Wales. The King stole the cow of the Irish monk, St.
Tathyw (Tathai). When the monk came to demand
the cow’s return, the King surrendered his son to the
Saint’s care. As a young man, Cadoc received his habit
from St. Tathyw and returned to his native country
to build a church at Llancarvan and a monastery
and college. Legend states that Cadoc once saved
his brother monks from famine by tying a thread to
the foot of a well-fed mouse. He then followed the
thread to an abandoned, well-stocked, underground
granary. Cadoc proselytized throughout Wales and
Brittany. He was martyred while serving at Mass.