Ibn Kullab

Ibn Kullab was an early Sunni theologian (mutakallim) in Basra and Baghdad in the first half of the 9th century during the time of the Mihna and belonged, according to Ibn al-Nadim, to the traditionalist group of the Nawabit. His movement, also called Kullabiyya, merged and developed into Ash'arism, which, along with Maturidism and Atharism, forms the theological basis of Sunni Islam.