Tūrān (Persian توران) is the Persian name for Central Asia, literally meaning "the land of the Tur". As described below, the original Turanians are an Iranian tribe of the Avestan age. As a people the "Turanian" are one of the two Iranian peoples both descending from the Persian Fereydun but with different domains and often at war with each other. In fact according to the Shahnameh's account, at least 1,500 years later after the Avesta, the nomadic tribes who inhabited these lands were ruled by Tūr, who was the emperor Fereydun's elder son. The association with Turks is also primarily based on the Shahnameh's geographical account where Turkification of Central Asia was partially completed during that time.
Tur/Turaj (Tuzh in Middle Persian) is the son of emperor Fereydun in ancient Iranian mythology. In the Shahnameh, he is identified with the Turks although culturally, there is no relationship between Turanians of the Shahnameh and the culture of ancient Turks. In 19th century and early 20th century discourse, now obsolete, Turan was primarily an ideological term designating Altaic and Uralic languages.