information:classification, structural:scholar_edition
Early life, family and education

Born in Tehran, in the Sublime State of Iran, to Reza Khan (later Reza Shah Pahlavi, first Shah of the Pahlavi dynasty) and his second wife, Tadj ol-Molouk, Mohammad Reza was the his father's eldest son and third of his eleven children. His father was of Mazandarani origin and born in Alasht, Savadkuh County, Māzandarān Province. He was a Brigadier-General of the Persian Cossack Brigade, commissioned in the 7th Savadkuh Regiment, who served in the Anglo-Persian War in 1856. Mohammad Reza's mother was a Muslim immigrant from Georgia (then part of the Russian Empire), whose family had emigrated to mainland Iran after Iran was forced to cede all of its territories in the Caucasus following the Russo-Persian Wars several decades prior. She was of Azerbaijani origin, being born in Baku, Russian Empire (now Azerbaijan).

Mohammad Reza was born with his twin sister, Ashraf. However, him, Ashraf, his siblings Shams and Ali Reza, and his older half-sister, Fatimeh, were not royalty by birth, as their father did not become Shah until 1925. Nevertheless, Reza Khan was always convinced that his sudden quirk of good fortune had commenced in 1919 with the birth of his son, who was dubbed khoshghadam ("bird of good omen"). Like most Iranians at the time, Reza Khan did not have a surname. After the 1921 Persian coup d'état which saw the deposal of Ahmad Shah Qajar, Reza Khan was informed that he would need a surname for his house. This led him to pass a law ordering all Iranians to take a surname; he chose for himself the surname Pahlavi, which is the name for the Middle Persian language, itself derived from Old Persian. At his father's coronation on 24 April 1926, Mohammad Reza was proclaimed Crown Prince.