Lewis & Short

2. Iūlus (trisyl.) (Jūl-), i, m., = Ἴουλος.

  1. I. The son of Ascanius and grandson of Æneas, whom the gens Julia regarded as their ancestor, Verg. A. 1, 288; Ov. M. 14, 583; Juv. 8, 42.
    Hence,
    1. A. Ĭūlēus, (Jūl-), a, um, adj., named from Iulus, son of Æneas, Iulian: mons, i. e. Albanus, Mart. 13, 108, 2: Iūlēi avi, Ov. F. 4, 124.
    2. B. Originating from Julius Cæsar.
      1. 1. Relating to Cæsar and his family: Iuleae Calendae, the first of July, Ov. F. 6, 797: Iulea carina, the fleet of Augustus, Prop. 4 (5), 6, 17.
      2. 2. Imperial: oliva, the garland of olive boughs given by Domitian, Mart. 9, 36, 9: habenae, the imperial power, id. 9, 102, 15.
  2. II. Jūlus (dissyl.), prænomen of Antonius, son of the triumvir M. Antonius, Hor. C. 4, 2, 2.