Lewis & Short

2. Dīdō, ūs and ōnis, f., Διδώ, the celebrated foundress of Carthage, daughter of the Tyrian king Belus, wife of Sichaeus, and sister of Pygmalion; called also Elisa or Elissa.
Nom.
Dido, Verg. A. 1, 299; 340; 360 et saep.; Ov. Am. 2, 18, 25; id. F. 3, 545; 640.
Gen. Dīdōnis, Just. 11, 10, 13; Aug. Conf. 1, 13; Macr. Sat. 4, 3, 6 al.: Dīdūs, Cornutus ap. Charis. p. 102 P.
Dat. Dīdō, Macr. Sat. 5, 2, 14 (dub. al. Didoni): Dīdōni, Tert. Anim. 33.
Acc. Dīdō, Verg. A. 4, 383; Ov. H. 7, 7; 133 (in both passages several MSS. read Didon); Vell. 1, 6, 2: Didonem, Treb. Pol. Trig. Tyr. 27, 1; August. Conf. 1, 13: Dīdūn, Atteius ap. Charis. l. l.
Abl. Dīdōne, Enn. ap. Prisc. p. 685 P.; Serv. Verg. A. 1, 223 (cf. Neue Formenl. 1, 352).