King Iarbas of Numidia is a significant character in Vergil's Aeneid, particularly in Book 4, representing a powerful ruler who is deeply affected by the arrival of Aeneas and the Trojans. He is depicted as a suitor to Dido, the queen of Carthage, and his anger and frustration over her infatuation with Aeneas highlight themes of love, rivalry, and the consequences of divine will.