What was the name of the area in the highlands of central Anatolia ruled by Deiotarus?
Deiotarus Deiotarus of Galatia (in Galatian and Greek Deiotaros, surnamed Philoromaios;  105 BC 42 BC, 41 BC or 40 BC) was a Chief Tetrarch of the Tolistobogii in western Galatia, Asia Minor, and a King of Galatia ("Gallo-Graecia"). He was considered one of the most adept of Celtic kings, ruling the three tribes of Celtic Galatia from his fortress in Blucium.
Armenian Highlands The Armenian Highlands (Armenian: Հայկական լեռնաշխարհ , "Haykakan leṙnašxarh " ; also known as the Armenian Upland, Armenian plateau, Armenian tableland, or simply Armenia) is the central-most and highest of three land-locked plateaus that together form the northern sector of the Middle East. To its west is the Anatolian plateau which rises slowly from the lowland coast of the Aegean Sea and converges with the Armenian Highlands to the east of Cappadocia. To its southeast is the Iranian plateau, where the elevation drops rapidly by about 2000 ft to 5000 ft above sea level. The Caucasus extends to the northeast of the Armenian Highlands. To the southwest of the Armenian Highlands is Upper Mesopotamia.