Orgetorix
Orgetorix was a wealthy aristocrat among the Helvetii, a Celtic-speaking people residing in what is now Switzerland during the consulship of Julius Caesar of the Roman Republic.
Planned migration
In 61 BC he convinced the Helvetians to attempt to migrate from Helvetian territory to south-western Gaul (modern-day France). He was also party to a clandestine arrangement with Dumnorix of the Aedui and Casticus of the Sequani to seize control of their respective tribes by arms and between them rule most of Gaul. The conspiracy was denounced, Orgetorix was called to a hearing in chains before the government of the Helvetii, he arrived with a small army, and was released but died mysteriously, a rumored suicide. The Helvetians went on with their plans for migration but were defeated in 58 BC and returned by Julius Caesar. This incident was the beginning of the Gallic War in which Caesar subjugated Gaul.
Etymology
Julius Pokorny segments the name [P]orgeto-rix, where the first element contains Gallic orge, "kill,", related to Old Irish orcaid, "kill," from the Indo-European root *per-g-, "to hit." The second element is manifestly Celtic rīx, "king:" "warrior-king," which does not imply that the owner of the name is necessarily a legal ruler. Although Orgetorix had aspirations in that direction, he was not one.