Cloud, cwmmwl: cymmylu

Clown, drelyn

Coach, cerbyd

Coast, arfordir, glan

Corps, byddinran

Couch, gorweddfaingc: gorwedd

Cough, peswch: pesychu

Count, iarll: rhifo

Court, llys: caru

Cramp, cwlwm gwythi: caethiwo