a chieftain of the Aedui, entered into the ambitious designs of Orgetorix, the Helvetian, whose daughter he married.
After the death of Orgetorix, the Helvetians still continuing their plan of migration and conquest, Dumnorix, who, with a view to sovereign power among his own people, was anxious to extend his influence in all possible quarters, obtained for them a passage through the territory of the Sequani. Caesar soon discovered that he had done so, and also that he had prevented the Aeduans from supplying the provisions they were bound to furnish to the Roman army.
In consequence, however, of the entreaties of his brother, Divitiacus, his life was spared, though Caesar had him closely watched.
This occurred in B. C. 58. When Caesar was on the point of setting out on his second expedition into Britain, in B. C. 54, he suspected Dumnorix too much to leave him behind in Gaul, and he insisted therefore on his accompanying him. Dumnorix, upon this, fled from the Roman camp with the Aeduan cavalry, but was overtaken and slain. (Caes. Gal. 1.3
; Plut. Caes. 18
; D. C. 38.31