List of people and places
| cabal |
| cabal-dee |
| cabonic |
| cadbury castle |
| cadbury hill |
| cadog |
| cador |
| caer gai |
| caer siddi |
| caerleon-on-usk |
| cai |
| caledon wood |
| caliburnus |
| cam |
| camarthen |
| camboglanna |
| camel |
| camelford |
| camelford |
| camelird |
| camelot |
| camlan |
| caradoc |
| carados |
| carannog |
| caratacus |
| carbonek |
| carlisle |
| carnarthur |
| carolhaise |
| castle dor |
| castle dore |
| castle of maidens |
| castle-an-dinais |
| cat coit celadion |
| cei |
| celaidon wood |
| celliwig |
| cerdic |
| cerrig mebiion arthur |
| chretien de troyes |
| claudas |
| cligés |
| cloives |
| coetan arthur |
| colchester |
| colgrevance |
| colgrin |
| condwiramurse |
| constans |
| constantine |
| corbenic castle |
| corineus |
| craigy dinas |
| culhwch |
| culwhch and olwen |
| cunobelinus |
| cunomarus |
| custennin |
| cymbline |
| cywyllog |