Antonia_Minor Antonia Minor (PIR2 A 885), also known as Antonia the Younger or simply Antonia (31 January 36 BCE-September/October 37CE) was a daughter of Roman politician Mark Antony and Octavia Minor, sister of emperor Augustus, and mother of future emperor Claudius.Antonia is one of the most prominent Roman women. She is celebrated for her virtue and beauty. She was the youngest daughter to Octavia Minor and Mark Antony and was also the favorite niece of her mother’s younger brother, Rome’s first Emperor Augustus.