Antonia, daughter of Mark Antony (died September/October 37CE). Antonia Minor was the younger daughter of Mark Antony and Octavia Minor, mother of Claudius, and grandmother of Caligula. In 31, she exposed a plot by her daughter Livilla and Praetorian Prefect Sejanus to assassinate Tiberius. Antonia imprisoned her daughter in her room until she starved to death. Antonia committed suicide shortly into Caligula's reign although some claim she was poisoned by Caligula. All coins bearing her name and portrait were struck by Claudius.