Antonia Minor
The adolescent Caligula was then sent to live with his great-grandmother (and Tiberius's mother), Livia. After her death, he was sent to live with his grandmother Antonia Minor. In 30, his brother Drusus was imprisoned on charges of treason and his brother Nero died in exile from either starvation or suicide. Suetonius writes that after the banishment of his mother and brothers, Caligula and his sisters were nothing more than prisoners of Tiberius under the close watch of soldiers.