Meaning Ky is of Celtic origin, it means a water strait, or a very narrow passage of water. Origin of Ky Celtic , Irish Popular Middle Names Karter Pronunciation 🔊 Listen Ky Similar Names Twiford Twitchel Kelven Kelwin Seachnall Camdene Coilin Atrus Arturs Farquharson Year by Year Popularity of Ky