3. A Tarentine, who adhered to the cause of the Romans throughout the second Punic war, notwithstanding the defection of his countrymen. He was on terms of friendly intimacy with Cato the Censor, who lived in his house after the recapture of Tarentum by Fabius Maximus (B. C. 209), and derived from him instruction in the tenets of the Pythagorean philosophy, of which Nearchus was a follower. (Plut. Cat. Ma. 2; Cic. de Sen. 12.)