
The Dahae (داها; Sanskrit: Dasa; Latin: Dahae; Δάοι (Daoi), Δάαι, Δᾶαι (Daai), Δάσαι (Dasai)), or Dahaeans were a confederacy of three Ancient Iranian tribes who lived in the region to the immediate east of the Caspian Sea. They spoke an Eastern Iranian language. It was known as Dihistan and Dahistan during the Sassanid perio...
Found on
http://en.wikipedia.org/wiki/Dahae

(from the article `Vologeses I`) ...( 54–63). A peace was finally concluded by which Tiridates was acknowledged as a Roman client king in Armenia. The power of Vologeses was further ... one of three nomadic or seminomadic tribes in the confederacy of the Dahae living east of the Caspian Sea; its members founded the Parthian empire....
Found on
http://www.britannica.com/eb/a-z/d/2
No exact match found.