an Entity references as follows:
Abū Ḥātim Aḥmad ibn Ḥamdān al-Rāzī (Persian: ابو حاتم احمد بن حمدان الرازی) was a Persian Ismaili philosopher of the 9th century, who died in 322 AH (935 CE). He was also the Da'i al-du'at (chief missionary) of Ray and the leader of the Ismaili da'wah in Central Persia.