Abu Hatim, Ahmad ibn Hamdan al-Razi (Persian: ابو حاتم احمد بن حمدان رازی) was a PersianIsmaili philosopher of the 9th century. He was also the chief dai' (missionary) of Rayy and the leader of the Ismaili d'awah in Central Persia.
^Henry Corbin, "The voyage and the messenger: Iran and philosophy", North Atlantic Books, 1998. pg 74: "Virtually all its greatest exponents covering the period from the ninth to the eleventh century C.E. show obvious Iranian affiliation. Examples are Abu Hatim Razi)"