Cours-ing, hela, heliad
Courte-sy, ymostyngiad; glinblygu
Cous-in, cefnder, cyfnither
Cov-er, clawr, cauad: toi, gorchuddio
Cov-ert, cuddfa, gwas-godfa; cudd, dirgel
Cov-et, chwennychu; cybyddu
Co-vey, nythaid; haid
Cow-ard, anwr, cachgi; anwraidd: digaloni
Crab-bed, anfoddog, croes, sarug
Cra-dle, cryd; dechreufa: siglo cryd