Meaning Keanan is an Irish name that means 'ancient' or 'little ancient one'. Origin of Keanan Celtic , Irish Popular Middle Names Omar Pronunciation 🔊 Listen Keanan KIY-nahn Similar Names Kean Kien Keene Keenon Kienan Farrell Feidhlimidh Ruadh Keannen Kian Year by Year Popularity of Keanan