Udan

The Udan stand for the idiquts of Qocho, who ruled the Uyghur kingdom of the Turpan basin and traced their lineage to Qutlugh of the Ediz clan. After the Kirghiz overthrew the Uyghur Khaganate, refugees founded Qocho in 843. In 866 Pugu Jun adopted the title idiqut, meaning lord of fortune, ruling from Qocho and Beshbalik.

The idiquts were vassals of the Qara Khitai from 1128 until Barchuk Art Tegin killed the Khitan magistrate in 1209 and submitted to Genghis Khan, who treated him as a fifth son. Mongol princesses married into the family for nearly a century.

Under the Yuan, Nolen Tekin became Prince of Gaochang in 1308, but war with the Chagatai Khanate wrecked the country. Ürüg Temür is attested as idiqut between 1335 and 1353 and was followed by Ching Temür, the last known ruler; the kingdom had ceased to exist by the 1370s.