  comment  by Parvaneh Borhani, A Persian, A parsy Professor of WW.university in Engineering, hard sciences, language,....  Doctor of Nuclear Engineering, UC Berkeley, USA, innovative in the roots of Words.  also at some point was a student at univ of Tehran, human cognition!,  and math and computer science.  she is now in Miami, Florida. - Ferdowsi is famous as a poet.  University is general sciences. It may or may not have been where the name of the university came from.   ferdows is a city, Pardis as I think may be the equivalent of American Word 'Paradise' dice? behesht. or ParDis, a dish shaped in the form of a Par. The old name for ferdows is TUN. Another old city is called TUS. Mashhad, a location of dying of thirst, shahid, shahd,...may have been located in big city of TUS, or just outside of it.  Interestingly enough, Ferdowsy is buried, or thought to be, in TUS. Now it brings about the discussion, that he ,the poet,may have been from Ferdows, and that's where the location Pasvand,suffix comes from. why buried in TUS.  Ferdowsy-e tusy? or ferdowsy-e tuny?  also add to Tehran def. may be nahran, may be tah-rey-an, rey another old city, capital of IRAN, then time.