Note:  Do not rely on this information. It is very old.

Pehlevi

Pehlevi, a form of the Persian language formerly current in western Iran, intermediate between the Old Persian of the Behistun inscriptions and Modern Persian, but overcharged with Semitic elements; is the language of the coins of the Sassanian dynasty, of several inscriptions of the early Sassanian kings, and of the oldest extant comments on the Avesta; died out towards the middle of the seventh century; grammar, by Spiegel, who proposes Huzvaresh as the proper name of this mixed Perso-Semitic language. The alphabet, of which there are several forms, is derived from the Aramaic or Old Syriac (Estranghelo), which is itself derived from the Phoenician.