He was the grandson of his namesake, Nosrat Dowleh Firouz Mirza, and of Mozaffar ad-Din Shah Qajar through his mother, Princess Ezzat-Dowleh.

[citation needed] This episode deeply alarmed Nosrat-ed-Dowleh's father, Abdol Hossein Mirza Farmanfarma, who warned his son to curb his extravagant princely lifestyle.

Despite pleas from the Farmanfarma family, he was not released, but instead transferred to a guarded house in Semnan, a village about eighty miles east of Tehran, where he was held incommunicado.

[citation needed] It was eventually revealed that he had been killed in his room by strangulation under the supervision of Dr. Ahmad Ahmadi.

[citation needed] In 1940, after Reza Shah abdicated in favour of his son, the courts found Dr. Ahmadi guilty of killing dozens of political prisoners and sentenced him to death by hanging.