Fath-Ali Shah Qajar
According to Farhad Daftary, a scholar of the Ismaili movement, "Aga Khan" is an honorific title bestowed on Hasan Ali Shah (1800–1881), the 46th Imām of Nizari Ismailis (1817–1881), by Persian king Fath-Ali Shah Qajar. However, Daftary apparently contradicts what the Aga Khan III noted in a famous legal proceeding in India: that "Aga Khan" is not a title but instead an alias that was given to the Aga Khan I when he was a young man.