Pompeia Magna (born 80/75 BC - before 35 BC) was the only daughter and second child born to Roman triumvir Pompey the Great (Gnaeus Pompeius Magnus) from his third marriage, to Mucia Tertia. Her eldest brother was Gnaeus Pompeius and her younger brother was Sextus Pompey.
Pompeia was born and raised in Rome. In 59 BC, Pompey had married Julia Caesaris, the daughter of Julius Caesar, as his fourth wife. Julia before marrying Pompey was betrothed to politician Marcus Junius Brutus the Younger, who later assassinated Caesar. After Pompey and Julia had married, Pompeia was betrothed to Quintus Servilius Caepio, but in the end she didn’t marry Caepio, instead Pompeia married Faustus Cornelius Sulla, a politician who was the son of Roman dictator Lucius Cornelius Sulla from his wife Caecilia Metella. Around 47 BC, Faustus had died in the African War against Julius Caesar. Her two sons fell into the hands of Julius Caesar, however Caesar dismissed them and pardoned them.
After 46 BC, Pompeia married for a second time to politician Lucius Cornelius Cinna, who was brother of Julius Caesar’s first wife Cornelia Cinna minor and the maternal uncle of Caesar’s late daughter with Cornelia, Julia Caesaris.
For a time Pompeia, had accompanied her younger brother Sextus Pompey to Sicily. It was in Sicily, that Pompeia made various presents for the younger future Roman Emperor Tiberius, who fled with his parents there from Octavian. Pompeia gave Tiberius as presents a cloak, a brooch and some gold plaques. The historian Suetonius, states that these presents were preserved and were exhibited in Baiae, in his time. Her younger brother survived Pompeia as she died before 35 BC.