Which Greek Stoic philosopher mentioned two of the four subgroups of the Helvetians that failed in their migration attempt to Gaul?
Posidonius Posidonius (Greek: Ποσειδώνιος, "Poseidonios", meaning "of Poseidon") "of Apameia" (ὁ Ἀπαμεύς) or "of Rhodes" (ὁ Ῥόδιος) (c. 135 BCE – c. 51 BCE), was a Greek Stoic philosopher, politician, astronomer, geographer, historian and teacher native to Apamea, Syria.
Seneca the Younger Seneca the Younger (c. 4 BC – AD65), fully Lucius Annaeus Seneca and also known simply as Seneca ( ), was a Roman Stoic philosopher, statesman, dramatist, and—in one work—humorist of the Silver Age of Latin literature. As a tragedian, he is best-known for his "Medea" and "Thyestes".