P'awstos Buzandac'i

Faustus of Byzantium (also Faustus the Byzantine, Armenian: Փավստոս Բուզանդ, P’avstos Buzand) was an Armenian historian of the 5th century. He wrote a six volume history, of which the first two volumes are lost. He described in details the reign of Arsaces II (Arshak II) and his son Papas (Pap). The foundation of knowledge concerning Christian Armenia from 317 to 387 which was written in Greek, was attributed to Faustus.

...
Wikipedia