(Μενέξενος), an Athenian, son of Demophon, was a disciple of Socrates, and is introduced by Plato as one of the interlocutors in the dialogues Lysis and Menexenus.
[C.P.M]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