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.
Sotiates The Sotiates were a pre-Roman tribe of the Aquitani, settled in what today is southwestern France, in the region surrounding Sos, in the French department of Lot-et-Garonne. Their capital was the city of "Sotium", present-day Sos. They are mentioned by Julius Caesar in the third book of "Commentarii de Bello Gallico", his firsthand account of the Gallic Wars, where he narrates the expedition of Publius Licinius Crassus to Aquitaine.