 The name Asōristān is a compound of "Asōr" ("Assyria") and the Iranian suffix "-istān" ("land of").The name Assyria, in the form "Asōristān", was shifted to include ancient Babylonia by the Parthians, and this continued under the Sasanians.The historical country of Assyria (Athura), however, lay to the north of Babylonian Asoristan, in the independent frontier province of Osroene.