[2] All of the forms of the name shown above derive, by regular sound laws, from Proto-Iranian *Θraitauna- (Avestan Θraētaona-) and Proto-Indo-Iranian *Traitaunas.

Fereydun, together with Kāve, revolted against the tyrannical king, Zahāk, defeated and arrested him in the Alborz Mountains.

Afterwards, Fereydun became the king, married Arnavāz and, according to the myth, ruled the country for about 500 years.

Iraj was Fereydun's youngest and favored son, and inherited the best part of the kingdom, namely Iran.

Salm inherited Anatolia ("Rûm", more generally meaning the Roman Empire, the Greco-Roman world, or just "the West"), and Tur inherited Central Asia ("Turān", all the lands north and east of the Amu Darya, as far as China), respectively.