Dost Mohammad Khan (Persian: دوست محمد خان, Pashto: دوست محمد خان, December 23, 1793 – June 9, 1863) was the founder of the Barakzai dynasty and one of the prominent rulers of Afghanistan during the First Anglo-Afghan War. With the decline of the Durrani dynasty, he became Emir of Afghanistan from 1826 to 1839 and then from 1845 to 1863. An ethnic Pashtun, he was the 11th son of Sardar Payendah Khan (chief of the Barakzai tribe) who was killed in 1799 by Zaman Shah Durrani.