(Εὐθύφρων; Euthýphrōn). Athenian seer, a character in Plato's eponymous dialogue: Socrates, who has been summoned to court, meets E., who wants to see his father prosecuted for manslaughter by criminal negligence, because he has allowed a slave to die who had been guilty of murder. Socrates' reservations about this way of action lead to a debate on the nature of piety. E. is also mentioned in Pl. Crat. 396d; 399e; 428c.
M. L. McPherran, Socratic Piety in the E., in: H. H. Benson (ed.), Essays on the Philosophy of Socrates, 1992, 220-241