Question: Which Greek Stoic philosopher mentioned two of the four subgroups of the Helvetians that failed in their migration attempt to Gaul?
Sentence (from "Persaeus"): Persaeus (Greek: Περσαῖος ; 307/6–243 BC ) of Citium, son of Demetrius, was a Greek Stoic philosopher, and a friend and favourite student of Zeno of Citium.
Relevant evidence: No