Pompeia Magna (about 42 BC - ?) was the daughter and only child of political rebel Sextus Pompeius and Scribonia. Pompeia is only the child born to one of the sons of triumvir Pompey the Great. Her paternal grandparents were Pompey and Mucia Tertia. Her maternal grandparents were consul of 34 BC, Lucius Scribonius Libo and an unnamed woman from the gens Sulpicius, the family that the Roman Emperor Galba, had descended from his paternal side. Her parents are distantly related. Sextus was a great uncle to her maternal grandfather, which Libo was a son to Cornelia Sulla. Cornelia Sulla was a daughter to Pompeia Magna and Faustus Cornelius Sulla. Pompeia Magna and Sextus Pompeius were siblings. In 39 BC, at the peace of Misenum, Sextus Pompeius had betrothed Pompeia to Marcus Claudius Marcellus, the nephew to the heir of Roman Dictator Julius Caesar, Octavian and a son to Octavian’s elder sister Octavia Minor. Pompeia and Marcellus in the end never married. She accompanied her father as they fled into Anatolia in 36 BC. After this moment, Pompeia is not mentioned again by the Roman ancient sources.
