Celtillus was an Gallic nobleman of the Arvernian people and the father of Vercingetorix. He obtained the status of principatum Galliae ('foremost man of all Gaul'), perhaps referring to the office of vergobret, the supreme magistracy exercised through a temporary elective mandate. He was murdered by members of his own people for attempting to replace the existing oligarchic system with kingship.
The Gaulish name Celtillus is an -illus derivative of the stem celt-, as in keltos ('Celt'); the precise meaning of the suffix remains uncertain, though it may have a diminutive value.
Some time around 70âÂÂ60 BC, Celtillus was murdered by members of his people for attempting to established a kingship regime, a more dictatorial form of rule over the tribe. Celtillus belonged to a group of Gallic populist strongmen who sought to establish monarchies within their communities, comparable to figures such as Orgetorix among the Helvetii.