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 Eadbhard Roibeard Keallach Deasmumhan Gillean Kambujiya Ruailidh Kamik Kerr Year by Year Popularity of Keanan