Abu Hatim Ṭayyib Ziyā'u d-Dīn (August 6, 1932 – May 23, 2015), full name Saiyedna Abu Haatim Taiyeb Ziyauddin Saheb and personal name Taiyyeb, Ayyubali with kunya (agnomen) "Abu Haatim", was the 44th Dā‘ī al-Muṭlaq, "the absolute or unrestricted missionary", of the Alavi Bohra, a minority group of Ismā‘īlī Shī‘ah Muslims. Since he assumed the position in 1974, the Alavi Bohra community has progressed both locally and internationally in education, economic prosperity, religion, and in the awareness among its youth of the group's identity and religious roots.