Iranian Kurdistan or Eastern Kurdistan (Kurdish: Rojhilatê Kurdistanê), is an unofficial name for the parts of northwestern Iran inhabited by Kurds which borders Iraq and Turkey. It includes the Kurdistan Province, Kermanshah Province, Ilam Province and parts of West Azerbaijan Province .A Kurdish enclave is also found in northeastern Iran in the province of North Khorasan province where they form the relative majority. Kurds generally consider Iranian Kurdistan to be one of the four parts of a greater Kurdistan, which also includes parts of southeastern Turkey (Northern Kurdistan), northern Syria (Western Kurdistan), and northern Iraq (Southern Kurdistan).According to the last census conducted in 2006, the four Kurdish-inhabited provinces in Iran, West Azerbaijan (2,873,459), Kermanshah Province (1,879,385), Kurdistan Province (1,440,156), and Ilam Province (545,787) have a total population of 6,738,787. Pockets of Lurs inhabit the southern areas of Ilam Province.Kurds in all province of Iran have a population about 9%—10% Iran's population a significant portion are Sunna. Sunni Kurds inhabit Kermanshah Province, except for those parts where people are Jaff, and Ilam Province; as well as some parts of Kurdistan and Hamadan provinces. The Kurds of Khorasan Province in northeastern Iran are also adherents of Sunni Islam. During the Shia revolution in Iran the major Kurdish political parties were unsuccessful in absorbing Sunni Kurds, who at that period had no interest in autonomy. However, since the 1990s Kurdish nationalism has seeped into the Sunni Kurdish area partly due to outrage against government's violent suppression of Kurds farther north.The Medes are considered to be the ancestors of the modern Kurdish people in the Middle East.