Celwyddwr, n. liar

Celydd, n. sheltered place

Celyn, n. holly wood

Celyneg, n. holly grove

Celynog, a. having holly

Celyrnaid, n. tub-full

Cell, n. cell; seclusion; grove

Cellaig, n. hart, stag

Cellawg, a. abounding with cells

Celli, n. grove; bower