List of rulers of Parthian sub-kingdoms
The Parthian Empire ruled over an area roughly corresponding to present-day Iran from the third century BC to the third century AD. It contained a varying number of subordinate semi-autonomous kingdoms each with its own ruler. Rulers of Hatra. In inscriptions found at Hatra, several rulers are mentioned. Other rulers are sporadically mentioned by classical authors. They appear with two titles. The earlier rulers are called "mry"' (translation uncertain, perhaps "administrator"), the later ones "mlk" -"king".