Khatun (Persian: خاتون – Khātūn, Turkish: Hatun) is a female title of nobility and alternative to male "khan" prominently used in the First Turkic Empire and in the subsequent Mongol Empire. It is equivalent to "queen" or "empress" approximately.
Khatun [is] a title of Sogdian origin borne by the wives and female relatives of the T'u-chüeh and subsequent Turkish rulers.
Katyn in modern kazakh languge, usually refers the married women, some many kazakh people call their wife katyn or katun in this modern time, too.
British Orientalist Gerard Clauson (1891–1974) considers "xa:tun" as borrowed from Sogdian "xwat'yn" (xwateen), in Sogdian xwat'y ('landlord, sovereign') and "xwat'yn" ('a landlord's or a sovereign's wife'); it is the precise wife'; it is the precise meaning of "xat:un" in the early period; cf. Pers.
Notable Khatuns 
See also 
- Mernissi, Fatima (1993). The Forgotten Queens of Islam. University of Minnesota Press. p. 21. "... Khatun 'is a title of Sogdian origin borne by the wives and female relatives of the Tu-chueh and subsequent Turkish Rulers ..."
- Clauson, Gerard (1972). An Etymological Dictionary of Pre-Thirteenth-Century Turkish. Oxford: Ai the Clarendon Press. p. 602.