Clio (from Greek Κλειώ, derived from the root κλειειν (kleiein) 'to celebrate') is, in Greek mythology, one of 'the sacred nine', the Nine Muses. She is the Muse of history. The name has traditionally been pronounced in British academic circles with the '-i-' like the first person pronoun 'I' (IPA: /ˈklaɪ əʊ/), although in most European languages it is the long vowel '-ee-', /ˈkliː o (or əʊ)/. Don't confuse it with Cleo.
- The name 'Clio' has been used as a girl's name and a brand name, notably for the Renault Clio motorcar. (The car is properly pronounced 'CLEE-oh'.)
- Three ships in the Royal Navy have borne the name H.M.S. Clio, one broken up in 1845 and two sold in 1920.
- A genus of gasteropods, largely floating sea-snails, has been named clio. The genus belongs to the cliidae family, to which it gives the name.