from Elymus the hero (named after Elymus, the hero)
Eponym Person
or from Helen (named after Helen)
Eponym Person
or from Elymas, king of the Tyrrhenians (named after Elymas, king of the Tyrrhenians)
Unclear Metalinguistic
Alexander in 'Europe' says 'Elimeion', because the syllable 'mei' is long and 'li' is short owing to the short i (an explanation of the form/pronunciation).