Khatun (Mongolian: Хатан, Khatan, Persian: خاتون – Khātūn, Urdu: خاتون – Khatoon, 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.
the Khatun (Katyn) in the Kazakh language, usually refers the married women, still many Kazakh people commonly call their wife as katyn or katun in this modern time. This word not only used in Kazakh language, but also one of the common word in all other Turkic speaking nations such as Turkish, Uzbek, Uighur, Tatar and Kirghiz etc.
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.
- 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.