King Caradog ap Ynyr (possibly the same person as Caradoc Freichfras) of Gwent's main court was originally at Caer-Guent (Caerwent),[6] but he gave the city to St. Tathyw, while the King let his horse lead him to a new home at Portskewett.
[7] St. Tathyw's relics at Tewkesbury indicate that he was reinterred in a reverential shrine some time prior to 1235.
When the monk came to demand the cow's return, the King surrendered his son Cadoc 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.
[8] Another story relates that as a child an angel appeared to Tathyw in a dream and suggested he might spread the Christian word in Wales.