Mohammad Khan Qajar, Persian tribal chief (born 1742)

Agha Mohammad Khan Qajar, also known by his regnal name of Agha Mohammad Shah, was the founder of the Qajar dynasty of Iran, ruling from 1789 to 1797 as Shah. Originally a chieftain of the Quwanlu branch of the Qajar tribe, Agha Mohammad Khan was enthroned as the king of Iran in 1789 and crowned shāhanshāh in 1796, after leading the Unification of Iran (1779–1796).