The Ottoman dynasty consisted of the members of the imperial House of Osman, also known as the Ottomans. According to Ottoman tradition, the family originated from the Kayı tribe branch of the Oghuz Turks, under the leadership of Osman I in northwestern Anatolia in the district of Bilecik, Söğüt. The Ottoman dynasty, named after Osman I, ruled the Ottoman Empire from c. 1299 to 1922.