The Oghuz Turks were a western Turkic people who spoke the Oghuz branch of the Turkic language family. In the 8th century, they formed a tribal confederation conventionally named the Oghuz Yabgu State
Enthroned figure usually identified as the last Oghuz Turk Seljuk Empire ruler Tughril III (1176–1194), from Rayy, Iran. Philadelphia Museum of Art.
Oghūz Khān in the Majma' al-tawarikh (circa 1425)
Male bust on a coin of Nasir al-Din Artuq Arslan, an Oghuz Döğer ruler of the Artuqid dynasty, Mardin, dated AH 611 (1214-5 CE)
The Kayı were an Oghuz Turkic ethnic group and a sub-branch of the Bozok tribal federation. In his Dīwān Lughāt al-Turk, the 11th century Kara-Khanid scholar Mahmud al-Kashgari cited Kayı as of one of
Council of Tuman, Köl Erki, Kayı Yavgu Han and Korkut. Jami al-Tawarikh (1426-30), Herat