Alp Er Tunga
Alp Er Tunga or Alp Er Tonga is a mythical Turkic hero who was mentioned in Mahmud al-Kashgari's Dīwān Lughāt al-Turk, Yusuf Balasaguni's Kutadgu Bilig and in the Vatican manuscript of Oghuznama by an unknown writer.
The Karakhanids claimed to have descended from Alp Er Tunga.