The date of his birth is unknown, died in1836 in Tashkent. He was the son of Abylai khan, and father of Kenesary khan. Kasym was very persistent and fair, faithful to his people. Kasym sultan spent his whole life fighting with Russian empire. There was a struggle against elimination of Khanate system in Middle zhuz and other military-administrative events of the empire. Kasym sultan, Abylai uly and his children, at the head of that for over twenty have consistently struggled with imperial system. Purpose of those disturbances was to re-create Kazakh khanate, ruled by sultans, ancestors of Abylai khan. Two of his sons, Sarzhan sultan and Kene khan helped him. They were the main commanders. Kasym sultan himself died of enemies, and buried nearby Abylai khan’s grave by Azret Sultan mosque. O. Dastanov have written in his book “The truth about sacred places”, published in 1967 in publishing house “Kazakhstan”: “According to come hypothesis and legends, number of buried people at “Big Aksatay” is higher. But because of neglect, most gravestones were destructed”. “…Kenesary’s father, should have also been buried here” (Dastanov, 1967: 26). Kasym sultan had sosns Kushak, Agaday, Uak, shuak, Nauryzbai, Esengeldi and brave daughter Bopy.