Cae, a field. Pl. caeau.
Caer, a fortress, or fortified town.
Cantrev, a district containing 100 townships. A canton, a hundred.
Capel, a chapel.
Careg, a stone. Pl. ceryg.
Carn, a heap of stones. The hoof of a horse.
Carnedd, a heap of stones. Pl. carneddau.
Castell, a castle. Pl. cestyll.
Ceulan, bank of a river.
Cevn, the bank, ridge of a hill.