Iranian Azerbaijanis
Iranian Azerbaijanis are a Turkic speaking people of mostly Iranian origin. According to Richard Frye, Iranian Azerbaijanis mainly descended from the earlier Iranian speakers of the region, who were Turkified after a massive migration of Oghuz Turks but still exist in smaller pockets, while Olivier Roy stated that Azerbaijanis as the descendants of the Iranian population of Azerbaijan (who spoke west Iranian languages such as Tati, which is still found in residual forms), which was Turkified by Turkomans from Anatolia from the 13th century onwards. The Azerbaijani language, who is lost the vocal harmony typical of Turkic languages, described as a Turkic language learned and spoken by Iranian peasants.