Old English ceace, cece "jaw, jawbone," in late Old English also "the fleshy wall of the mouth." Perhaps from the root of Old English ceowan "chew" (see chew (v.)), or from Proto-Germanic *kaukon (cf. Middle Low German kake "jaw, jawbone," Middle Dutch kake "jaw," Dutch kaak), not found outside West Germanic.
Words for "cheek," "jaw," and "chin" tend to run together in IE languages (e.g. PIE *genw-, source of Greek genus "jaw, cheek," geneion "chin," and English chin); Aristotle considered the chin as the front of the "jaws" and the cheeks as the back of them. The other Old English word for "cheek" was