From Wikipedia, the free encyclopedia 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] Reference to Cyllin is also given in Iolo Morganwg's "Third series" of forged Welsh Triads.[3] He is also discussed in the works of Rice Rees, Jane Williams, Sabine Baring-Gould and John Williams (Ab Ithel) as brother of Saint Eigen and father of King Coel.[4][5][6][7] He is also noted in a manuscript giving the genealogy of Taliesin from the collection of Thomas Hopkin of Coychurch along with one from the Havod Uchtryd collection where he is called Cynan, a name often associated with Conan Meriadoc.[