4. The youngest brother of Plato, whose name the philosopher has immortalised in his dialogue " Parmenides." (Plut. de Frat. Amor. p. 484f.) The father of Plato's wife was likewise called Antiphon. (Plut. de Genio Socrat.)
A Dictionary of Greek and Roman biography and mythology
Smith, William
A Dictionary of Greek and Roman biography and mythology. William Smith, LLD, ed. 1890