Persarmenia

Nor Shirakan (Armenian: Նոր Շիրական), Parskahayk (Armenian: Պարսկահայք) or Persarmenia, was the seventh province of Greater Armenia, situated on the western shore of Lake Urmia, bordered on Adiabene and Atropatene, now in northwestern Iran. Following the partition of Greater Armenia between the Roman Empire and Sassanid Empire in 387, the territory under Sassanid influence came to be known as Persarmenia. The region of Arzanene, traditionally part of Lesser Armenia, also became part of Persarmenia.

Zarehavan was the centre of the province.

Persarmenia had nine cantons:

...
Wikipedia