I don't know about the minute details, and if you really want to know about all the sub-divisions within Armenia as a whole, think of it this way. All of geographical Armenia under Sassanid rule had essentialy one ruler, a Persian Marzpan that was appointed by Sassanid chief himself. All those that ruled the provinces within Hayastan herself were Armenian, nothing more nothing less. It's been this way traditionally. Our Nakharars were always quite autonomous.
Hayastani Marzpan means Marzpan of Hayastan (as the suffix -i refers to possession, "of").
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