Arsacid Dynasty
Iranian contact in the region goes back to the Median and Achaemenid times. During this Arsacid Dynasty of Caucasian Albania, the Parthian language spread in the region. It is possible that the language and literature for administration and record-keeping of the imperial chancellery for external affairs naturally became Parthian, based on the Aramaic alphabet. According to Toumanoff: "the predominance of Hellenism, as under the Artaxiads, was now followed by a predominance of "Iranianism", and, symptomatically, instead of Greek, as before, Parthian became the language of the educated".