Antiphon
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.)
From William Smith (ed.), Dictionary of Greek and Roman Biography and Mythology. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.