麻赫穆德·喀什噶里
However, it is uncertain whether this group's formation is connected to the Pechenegs' first or second migration (as it is proposed by Pritsak and Golden, respectively). According to Mahmud al-Kashgari, one of the Üçok clans of the Oghuz Turks was still formed by Pechenegs in the 1060s.