Muhammad Shaybani Khan (, also known as Abul-Fath Shaybani Khan or Shayabak Khan or Shahi Beg Khan, originally named "Shibägh", which means "wormwood" or "obsidian") (c. 1451 – 2 December 1510), was an Uzbek leader who consolidated various Uzbek tribes and laid the foundations for their ascendance in Transoxiana and the establishment of the Khanate of Bukhara. He was a Shaybanid or descendant of Shiban (or Shayban), the fifth son of Jochi, Genghis Khan's eldest son. He was the son of Shah-Budag, thus a grandson of the Uzbek conqueror Abu'l-Khayr Khan. Biography The ruler of the Uzbek ulus Abu'l-Khayr Khan (1428-1468) had eleven sons, one of whom was Budaq Sultan, the father of Shaybani Khan. Shaybani Khan's mother's name was Aq Quzi Begum. Through his mother, Muhammad Shaybani was therefore the cousin of Janibek's son Kasym Khan, the latter of whom ultimately conquered most of Shaybani's territory to expand the Kazakh Khanate. According to the historian Kamal ad-Din Binai, Budaq Sultan named his eldest son as Sultan Muhammad Shaybani, and gave him a nickname - "Shibag". According to sources, the genealogy of Shaybani Khan is as follows: Abu'l-Fath Muhammad Khan Shaybani, known under the name of Shakhibek Khan, son of Sultan Budaq, son of Abu'l-Khayr Khan, son of Daulat Shaikh-oglan, son of Ibrahim-oglan, son of Fulad-oglan, son of Munk Timur Khan, son of Abdal-oglan, son of Jochi-Buk Khan, son of Yis-Buk, son of Baniyal-Bahadur, son of Shayban, son of Jochi Khan, son of Genghis Khan. It is interesting that in "Tavarikh-i guzida-yi nusrat-namah" (Chagatai:تواریخ گزیده نصرت‌نامه, "Selected stories from the Book of Victories"), it is noted that the wife of the ancestor of Shaybani Khan, Munk Timur was the daughter of Jandibek, who was a descendant of Ismail Samani. Shaybani's father Budaq Sultan was an educated person, on whose order extensive translations of Persian works into the Turkic languages were accomplished. Rise to power Shaybani was initially an Uzbek warrior leading a contingent of 3,000 men in the army of the Timurid ruler of Samarkand, Sultan Ahmed Mirza under the Amir, Abdul Ali Tarkhan. However, when Ahmed Mirza went to war against Sultan Mahmud Khan, the Khan of Moghulistan, to reclaim Tashkent from him, Shaybani secretly met the Moghul Khan and agreed to betray and plunder Ahmed's army. This happened in the Battle of the Chirciq River in 1488 CE, resulting in a decisive victory for Moghulistan. Sultan Mahmud Khan