Divanü Lügati't-Türk . (See Kasgar) Khan (as a title) (sometimes spelled Han , Xan , Ke-Han , Turkic : khān Mongolian : Хаан qāān , Chinese : 可汗 or 大汗, kehan or dahan ) is originally a Central Asian title for a sovereign, or military ruler, first used by Altaic-speaking nomadic