Lewis & Short

2. Īlĭa, ae, f.,

  1. I. a poetical name of Rhea Silvia, daughter of Numitor and mother of Romulus and Remus, Enn. ap. Charis. p. 70 P. (Ann. v. 56 Vahl.); Verg. A. 1, 274; Ov. F. 2, 383; 598; Hor. C. 1, 2, 17; 3, 9, 8; 4, 8, 22.
  2. II. Deriv.: Īlĭădes, ae, m., son of Ilia.
    1. A. Adj.: Romulus Iliades Iliadesque Remus, Ov. Am. 3, 4, 40: pater, i. e. Romulus, id. F. 4, 23: fratres, i. e. Romulus and Remus, id. ib. 3, 62.
    2. B. Subst., i. e. Romulus, Ov. M. 14, 781 and 824.