What is "carantoc"

Saint Carantoc (; ; ; ), also anglicized as Carantock and by other spellings, was a 6th-century abbot, confessor, and saint in Wales and the West Country. He is credited with founding Llangrannog, Ceredigion, Wales and St Carantoc's Church, Crantock. His name is listed amongst the Cornish Saints. Carantoc's is one of five insular saints' lives and two Breton ones that mention Arthur in contexts that may be independent of Geoffrey of Monmouth's Historia Regum Britanniae.