Which Greek Stoic philosopher mentioned two of the four subgroups of the Helvetians that failed in their migration attempt to Gaul?
Helvetii The Helvetii (Latin: "Helvētiī" ] ) were a Gallic tribe or tribal confederation occupying most of the Swiss plateau at the time of their contact with the Roman Republic in the 1st century BC. According to Julius Caesar, the Helvetians were divided into four subgroups or "pagi." Of these Caesar only names the Verbigeni and the Tigurini, while Posidonius mentions the Tigurini and the Tougeni (Τωυγενοί ). They feature prominently in the "Commentaries on the Gallic War," with their failed migration attempt to southwestern Gaul (58 BC) serving as a catalyst for Caesar's conquest of Gaul.
Santones The Santones or Santoni or Santii (Ancient Greek: Σάντονες, Σάντονοι, Σάντωνες , French: "Santons" ) were a tribe of ancient Gaul located in the modern region of Saintonge and around the city of Saintes, city to which they gave their name. The Romans occupied the territory of the Santones from the 1st century BC.