Dĭŏnsĭus, ii, m., = *dionu/sios, the name of several celebrated Greeks; esp., I.The elder Dionysius, tyrant of Syracuse, Nep. Dio, 1; id. Reg. 2; Cic. Tusc. 5, 20 sq.; id. N. D. 3, 33 sq. al.—II.His son, likewise tyrant of Syracuse, Nep. Dio, 3 sq.; Just. 21, 1 sq.; Cic. Tusc. 3, 12; id. Fam. 9, 18; Val. Max. 6, 9, 6extr.—III. Heracleotes, a pupil of Zeno of Citium, at first a Stoic, afterwards a Cyrenaic, Cic. Fin. 5, 31; id. Tusc. 2, 25; 3, 9; id. Ac. 2, 22 fin.—IV.A Stoic, contemporary with Cicero, Cic. Tusc. 2, 11.—V.A musician of Thebes, Nep. Epam. 2, 1.—VI.Name of a slave, Hor. S. 1, 6, 38.—VII. Dionysius Cato, author of the Disticha de moribus ad filium, v. Teuffel, Roem. Lit. 34, 2.