Aga Khan I, also Āghā Khān I and Āqā Khān I, was the title accorded to Ḥasan ‘Alī Shāh (b. 1804 in Kahak; d. 1881), the 46th Imam of the Qāsim-Shāhī Nizari Ismailis. Wikipedia
The definitive Wikipedia entry for Aga Khan I. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Aga_Khan_I