Shâh: Emperor, followed by Shâhanshâh of Iran, with style His Imperial Majesty
Shahbânu: Shahbânu or Empress, followed by first name, followed by "of Iran", with style Her Imperial Majesty
Valiahd: Crown Prince of Iran, with style His Imperial Highness
Younger sons: Prince (Shâhpūr, or King's Son), followed by first name and surname (Pahlavi), and style His Imperial Highness.
Daughters: Princess (Shâhdokht, or King's Daughter), followed by first name and surname (Pahlavi), and style Her Imperial Highness.
Children of the monarch's daughter/s use another version of Prince (Vâlâ Gohar, "of superior essence") or Princess (Vâlâ Gohari), which indicate descent in the second generation through the female line, and use the styles His Highness or Her Highness. This is then followed by first name and father's surname, whether he was royal or a commoner. However, the children by the last Shah's sister Fatemeh, who married an American businessman as her first husband, are surnamed Pahlavi Hillyer and do not use any titles.
^Afkhami, Gholam Reza (2009). The Life and Times of the Shah. University of California Press. p. 4. (..) His mother, who was of Georgian origin, died not long after, leaving Reza in her brother's care in Tehran. (...).
^GholamAli Haddad Adel; et al. (2012). The Pahlavi Dynasty: An Entry from Encyclopaedia of the World of Islam. EWI Press. p. 3. (...) His mother, Nush Afarin, was a Georgian Muslim immigrant (...).
^ abcd"Former Iranian Crown Prince Reza Pahlavi will proclaim himself the new shah of Iran", United Press International, 17 October 1980, archived from the original on 28 January 2019, retrieved 25 January 2019, His Imperial Highness Reza Pahlavi, Crown Prince of Iran, will reach his constitutional majority on the 9th of Aban, 1359 (October 31, 1980). On this date, and in conformity with the Iranian Constitution, the regency of Her Imperial Majesty Farah Pahlavi, Shahbanou of Iran, will come to an end and His Imperial Highness, who on this occasion will send a message to the people of Iran, will succeed his father, His Imperial Majesty Mohammed Reza Shah Pahlavi, deceased in Cairo on Mordad 5, 1359 (July 27, 1980).