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.
Caucones The Caucones (Greek: Καύκωνες , "Kaukones") were an autochthonous tribe of Anatolia (modern-day Turkey) whose migrations brought them to the western Greek mainland in Arkadia, Triphylian Pylos, and north into Elis. Their etymology suggests strong affinities with the Caucasos Mountains originally. Russian KAVKAZ for Caucasus is attached to the two mountain ranges that serve as a ‘spine’ or backbone between the northern and southern regions dividing Europe from Asia. Kaz-Kaz people known from the written Hittite tablets, indeed, lived along the southern shore of the Black Sea, exactly where the Homeric "Iliad" placed the Kaukônes.1 According to Herodotus and other classical writers, they were displaced or absorbed by the immigrant Bithynians, who were a group of clans from Thrace that spoke an Indo-European language. Thracian Bithynians also expelled or subdued the Mysians, and some minor tribes, the Mariandyni alone maintaining themselves in cultural independence, in the northeast of what became Bithynia. Strabo (12.3.3) acknowledges that in earlier times Bithynians were called Mysians who, in turn, Herodotus (7.20, 75) says alongside Teucrians were invaders of northern Greece (Thessaly) before the Trojan War.