Meaning Keithan is a Celtic name for a boy, it means the wind. Origin of Keithan Celtic , Irish +-100%Zoom level changed to 1 Popular Middle Names Isaiah Pronunciation 🔊 Listen Keithan Similar Names Keandre Gervase Guthrie Knoton Gaothaire Annan Keanu Adan Artie Artek Year by Year Popularity of Keithan