Who led the group that founded the Kazakh khanate?

The Kazakh khanate was founded around 1465 under the leadership of Karay and Jani Beg.123

These leaders were originally subjects of the Uzbek khan Abū’l-Khayr. Dissatisfied with his rule, they led approximately 200,000 followers into Mughulistān, where they were settled between the Chu and Talas rivers by the local khan, Esen Bogha. These separatist groups became known as Kazakhs, a term meaning "Independent" or "Vagabond," and they eventually established a powerful nomadic empire across the steppe.123