Studying the history of Kazakhstan in the 14 th and 15 th centuries goes hand in hand with creative use of the extensive historical material accumulated over the years. And especially valuable parts of this legacy are manuscript sources of that period written in the Persian language. In this article the author examines historikal importance of formation of Kazakh khans and the origine of Kazakh khans. The formation of Kazakh khans was preparared by all precedind history of development of states such as Ak-Orda and Mogylistan. And so why it‘s impossible to dekide the question of formation of Kazakh khans dynasties without studying history of Ak-Orda. At the present there are two points of view about the origin of Kazakh khans dynasties. One of the investigators think that the last one had origine from the house of Orda-Edjen, others think that they are posterities of Tuk-Timur, Dzhuchy‘s thirteenh son. Comparing various historical sources, the author of article analyzesthe points of view of famous researchers on this problem. Article purpose – to prove that Urus Khan is the descendant Orda-Edzhena according to a valuable source Mu'in ad-Din of Natanzi”Muntakhab at-tavarikh-and Mu'ini” from 815-816 h., which was written at the request of Eskendir, the grandson Tamirlan.
Meruert Ibragimova (2026) studied this question.