Proxenus of Atarneus (Greek: Πρόξενος ὁ Ἀταρνεύς) is most famous for being Aristotle's guardian after the death of his parents.
Proxenus educated Aristotle for a couple of years before sending him to Athens to Plato's Academy.
Proxenus had married Aristotle's older sister Arimneste, whereby they had a daughter Hero and a son Nicanor.
Hero's own son, Callisthenes, would later become a student and collaborator with his great-uncle Aristotle.
Nicanor eventually married Aristotle's daughter, Pythias.