Deiotarus of Galatia (in Galatian and Greek Deiotaros, surnamed Philoromaios ("Friend of the Romans"); c. 105 BC – 42 BC, 41 BC or 40 BC)[1] 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.[2]
The name Deiotarus is generally translated as Galatian Celtic "Divine-bull" (*deiuo-tauros; cf. Old Irish dia, Welsh duw, Old Welsh duiu, "God" and Old Irish tarb, Welsh tarw "bull", with Western Celtic metathesis of the cluster -uro- to -ruo-).[3][4]