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.
Èrs people The Èr people, also known as Èrsh or (in Georgian works) the Hers, are a hypothetical ancient people inhabiting northern modern Armenia, and to an extent, small areas of northeast Turkey, southern Georgia, and northwest Azerbaijan . Most of their history is constructed based on linguistic (primarily based on placenames) data, compared to historical trends in the region and historical writings, such as the Georgian Chronicles or the Armenian Chronicles. They were a constituent of the state of Urartu, which either incorporated or conquered them during the 8th century BCE. Their relation to the main Urartians is unknown. Linguistically, based on placenames, some scholars argue they were a Nakh people