Cyllin was a legendary, and possibly historical British king of the 1st century AD, early Christian saint and the last pendragon of Great Britain. His existence is based on very limited evidence.[1]Richard Williams Morgan claimed that a reference to him as a son of Caratacus was found in the family records of Iestyn ab Gwrgant and used this as evidence of early entry of Christianity to Britain;
Cyllin ab Caradog, a wise and just king. In his days many of the Cymry embraced the faith in Christ through the teaching of the saints of Cor-Eurgain, and many godly men from the countries of Greece and Rome were in Cambria. He first of the Cymry gave infants names; for before, names were not given except to adults, and then from something characteristic in their bodies, minds, or manners.[2]