Glaucon

Glaucon, son of Ariston, was an ancient Athenian and Plato's older brother. He is primarily known as a major conversant with Socrates in the Republic. According to Debra Nails, two major facts about Glaucon's life can be ascertained from a single comment by Socrates in the Republic, that Glaucon was old enough to have distinguished himself in a battle at Megara, and that he was the eromenos of the poet and statesman Critias. In Book V of the Republic, an exchange between Socrates and Glaucon indicates that Glaucon owned property where he kept and bred sporting dogs and game birds.