In English, name Eth means – Diminutive of Ethel: From the Old English aethel meaning noble. Also a diminutive of Etheldreda, Ethelinda, and other feminine names beginning with Ethel-. Famous bearer: American actresses Ethel Merman and Ethel Barrymore.. Other origins for name Eth include – English, Irish, Irish. Name Eth is most often used as a girl name or female name.