Danaus, Ging of Argines, of whom the countrey of Achaia, was after named Danaa, and al the Grecians Danai. He begot 50. daughters: which of their graundfathers name were called Belides, and of their father Danaides. They all in one night killed their husbandes, the sonnes of their vucle Aegyptus, sauing onlie Hyperinnestra, which saued hir husbãd Lynceus. Vide Belides.
Lewis and Short: Latin dictionary
Dănăus, i, m., *danao/s, son of Belus, and twin-brother of Aegyptus: he was the father of fifty daughters; he emigrated from Egypt into Greece, and there founded Argos; was slain by Lynceus, after a reign of fifty years, Hyg. Fab. 168; 170; Serv. Verg. A. 10, 497; Cic. Parad. 6, 1, 44; cf. under no. II. B.—Danai porticus, at Rome, dedicated by Augustus to the Palatine Apollo (726 A. U. C.), famed for its statues of Danaus and his daughters, Ov. Am. 2, 2, 4; cf. Prop. 2, 31, 4 (3, 29, 4 M.); Tibul. 1, 3, 79; Ov. Tr. 3, 1, 60.—II. Derivv. A. Dănăus, a, um, adj. (belonging to Danaus; hence, in the poets, meton.), Greek, Grecian: classes, Ov. M. 13, 92; cf. rates, Prop. 3, 22, 34 (4, 22, 34 M.): flammae, Ov. M. 14, 467: ignis, id. Her. 8, 14: miles, id. ib. 24: manus, id. R. Am. 66: res, id. M. 13, 59. Esp. freq., A.Subst. plur.: Dănăi, ōrum, m., the Danai, for the Greeks (esp. freq. of the Greeks before Troy), Cic. Tusc. 4, 23, 52; id. Fin. 2, 6, 18; Prop. 3, 8, 31 (4, 7, 31 M.); Verg. A. 2, 5 et saep.—Gen. plur.: Danaum, Lucr. 1, 87; Prop. 2, 26, 38 (3, 22, 18 M.); 3, 9, 40 (4, 8, 40 M.); Verg. A. 1, 30 et saep.—B. Dănăĭdes, um, f., *danai+/(des, the daughters of Danaus, the Danaides, who, with the exception of Hypermnestra, murdered their husbands at their father's command, Hyg. Fab. 170; 255; Sen. Herc. Fur. 757. The classical poets substitute Danai proles, Tib. 1, 3, 79; cf. Prop. 2, 31, 4 (3, 29, 4 M.): Danai puellae, Hor. Od. 3, 11, 23: Danai genus infame, id. ib. 2, 14, 18.—C. Dănăĭdae, ārum, m., *danai+/dai = Danai (v. no. II. A.), the Greeks, Sen. Troad. 611.