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Jalal al-Din Mangburni (Persian also known as Jalal al-Din Khwarazmshah Minkubirni or Mengu-Berdi .1199 – August 1231), was the last Khwarazmshah of the Anushteginid dynasty. The eldest son and successor of Ala ad-Din Muhammad II of the Khwarazmian Empire, Jalal al-Din was brought up at Gurganj, the wealthy capital of the Khwarazmid homeland. An able general, he served as second-in-command to his father in at least one battle; however, since he was the son of a concubine, he was challenged as successor by a younger brother, whose cause was supported by the powerful Queen Mother, Turken Khatun. Nevertheless, after the Mongol conquest of the Khwarazmian Empire led to his father's flight and death on an island in the Caspian Sea, Jalal-al Din gained the loyalty of the majority of Khwarazmian loyalists.

Jalal al-Din Mangburni (Persian also known as Jalal al-Din Khwarazmshah Minkubirni or Mengu-Berdi .1199 – August 1231), was the last Khwarazmshah of the Anushteginid dynasty. The eldest son and successor of Ala ad-Din Muhammad II of the Khwarazmian Empire, Jalal al-Din was brought up at Gurganj, the wealthy capital of the Khwarazmid homeland. An able general, he served as second-in-command to his father in at least one battle; however, since he was the son of a concubine, he was challenged as successor by a younger brother, whose cause was supported by the powerful Queen Mother, Turken Khatun. Nevertheless, after the Mongol conquest of the Khwarazmian Empire led to his father's flight and death on an island in the Caspian Sea, Jalal-al Din gained the loyalty of the majority of Khwarazmian loyalists.

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Through the ruler of Alamut, the Mongols learned that Jalal ad-Din had recently been defeated; the Nizari Ismaili Assassins sent a letter to Ögedei Khan, proposing joint operation against Jalal al-Din. 392–3 Ögedei Khan sent a new army of 30,000 – 50,000 men under the command of Chormagan and the remaining Khwarazmians, whose numbers were in hundreds, were swept away by the new Mongol army, which occupied Northern Iran. Jalal ad-Din took refuge in the Silvan mountains and there in August he was killed by a Kurd who claimed that he was avenging his brother, who had been killed in Ahlat