English Etymology From Eton + -ian. Pronunciation (UK) IPA(key): /iːˈtəʊ.nɪ.ən/ Rhymes: -əʊniən Noun Etonian (plural Etonians) One who is enrolled in or has graduated from Eton College. Derived terms Old Etonian Anagrams Antoine, Noetian, enantio-, enation Wikiwand - on Seamless Wikipedia browsing. On steroids.