Sunni Muslims are second largest religious group in Iran specifically Sunni Islam came to rule in Iran after the period Sunni were distinguished from Shi'a through the Ghaznavids from 975 AD, followed by the Great Seljuq Empire and the Khwārazm-Shāh dynasty until the Mongol invasion of Iran. Islam returned to rule when Ghazan converted but he soon converted specifically to Shi'a. In recent times about 9% of the Iranian population are Sunni Muslims - mostly Turkomen, a minority of Arabs (mainly in Hormozgan Province), Baluchs, and Kurds living in the southwest, southeast, northeast and northwest. The predominant school of theology and jurisprudence (Madh'hab) among Sunni in Iran is Hanafi established by Abu Hanifa an-Nu‘man.