Scipio Aemilianus was the second son of Lucius Aemilius Paullus Macedonicus, the commander of the Romans' victorious campaign in the Third Macedonian War, and his first wife, Papiria Masonis. Scipio was adopted by his first cousin, Publius Cornelius Scipio, the eldest son of his aunt Aemilia Tertia and her husband Publius Cornelius Scipio Africanus, the acclaimed commander who won the decisive battle of the Second Punic War against Hannibal. This made Scipio Africanus the adoptive grandfather of Scipio Aemilianus. On adoption, he became Publius Cornelius Scipio Aemilianus, assuming the name of his adoptive father, but keeping Aemilianus as a fourth name to indicate his original nomen. His elder brother was adopted by a son or grandson of Quintus Fabius Maximus Verrucosus, another prominent commander in the Second Punic War, and his name became Quintus Fabius Maximus Aemilianus.