Antonia Minor), also known as Antonia the Younger or simply Antonia (January 31, 36 BCE - September/October CE 37) is the younger of two daughters of Roman politician Mark Antony and Octavia Minor.

Tacitus Ann.

4.44.2 and 12.54.2 may have confused the two Antonia sisters (of whom the younger is far more famous).

The problem is even more complex: an even older Antonia was born to a previous wife of Antony.

That daughter is properly Antonia Maior (the Elder) while the woman usually called Antonia the Younger is in fact Antonia Tertia.

The woman usually called Antonia the Younger is the younger niece of the Emperor Augustus, sister-in-law of the Emperor Tiberius, paternal grandmother of the Emperor Caligula and Empress Agrippina the Younger, mother of the Emperor Claudius, and both maternal great-grandmother and paternal great-aunt of the Emperor Nero.

She is additionally the maternal great-aunt of the Empress Valeria Messalina and Faustus Cornelius Sulla Felix, and paternal grandmother of Claudia Antonia, Claudia Octavia, and Britannicus.

Antonia is one of the most prominent Roman women.

She is celebrated for her virtue and beauty.

She is the youngest daughter to Octavia Minor and Mark Antony and is also the favorite niece of her mother’s younger brother, Rome’s first Emperor Augustus.