(Ἐμμενίδαι), a princely family at Agrigentum, which traced its origin to the mythical hero Polyneices. Among its members we know Emmenides (from whom the family derived its name) the father of Aenesidamus, whose sons Theron and Xencerates are celebrated by Pindar as victors at the great games of Greece. Theron won a prize at Olympia, in Ol. 76 (B. C. 476), in the chariot-race with four full-grown horses, and Xenocrates gained prizes in the horserace at the Pythian, Isthmian, and Panathenaic games. (Pind. Ol. 2.48, 3.38, Pyth. 6.5, with the Scholiast, and Böckh's Explicat. ad Pind. pp. 114, &c., 119. 122, 127, 135; Muller, Orchom. p. 332, 2nd edit.)