Question: What was the name of the area in the highlands of central Anatolia ruled by Deiotarus? 
Sentence (from "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").
Relevant evidence: Yes