Attalus (Stoic)
Attalus (fl. c. 25 AD, reign of Tiberius) was a Roman Stoic philosopher, remembered as the teacher of Stoicism to Seneca the Younger. The elder Seneca called him a man of great eloquence and the acutest philosopher of his age; he was defrauded of his property by Sejanus and exiled, reduced to farming. His written works are lost (Seneca mentions one on lightning).
Why he’s here
He survives through his most famous pupil. Seneca quotes him warmly (Letter 108), recalling a practical, ascetic Stoicism — praise of poverty, moderation in food and drink, freedom from unnecessary pleasures — that left the young Seneca wanting to live “a poor man.” Attalus is a case of philosophy transmitted as a way of life through teaching rather than text, and a node on the chain that runs into Roman Stoicism’s best-known voice. Source: Wikipedia (T2, tertiary, via Seneca; thin record).