Publius Clodius Thrasea Paetus (died AD 66), Roman senator, who lived in the 1st century AD. Notable for his principled opposition to the emperor Nero and his interest in Stoicism, he was the husband of Arria, who was the daughter of A. Caecina Paetus and the elder Arria, father-in-law of Helvidius Priscus, and a friend and relative by marriage of the poet Persius. Thrasea was the most prominent member of the political faction known today as the Stoic Opposition.