In Roman mythology, Lavinia is the daughter of King Latinus and Amata, and the last wife of Aeneas. Oracles forbid a Latin marriage; her hair blazing at the altars foreshadows both her renown and war for Latium. Aeneas names the city Lavinium for her.
Adapted from Wikipedia, "Lavinia" · CC BY-SA 4.0
I.Oracle and omen
As Latinus' only child, Lavinia is courted by many suitors; Turnus of the Rutuli has Queen Amata's favour. Faunus warns Latinus in a dream that his daughter must not marry a Latin — foreign sons-in-law will lift the Latin name starward. At sacrifice in Aeneid 7, Lavinia's hair and crown catch fire: seers read glory for the girl and a great war for her people.
II.Marriage and aftermath
When Trojan envoys arrive, Latinus recognizes Aeneas as the destined bridegroom. The resulting war with Turnus ends in Trojan victory; Aeneas takes Lavinia and founds (or renames) Lavinium. Genealogies diverge: some give them Silvius; Livy makes Ascanius their son and has Lavinia act as regent while he is young, with Silvius as Ascanius' son.
She appears with Latinus among the virtuous pagans in Dante's Inferno and receives a biography in Boccaccio's De mulieribus claris; Ursula K. Le Guin's novel Lavinia expands her voice as first-person narrator.