Nero had eight siblings: four brothers (Tiberius and Gaius Julius, who died young Drusus Caesar and Gaius, nicknamed 'Caligula'), three sisters ( Agrippina the Younger, Julia Drusilla, and Julia Livilla) and a brother or sister of unknown name (normally referenced as Ignotus). His maternal grandparents were Marcus Vipsanius Agrippa, a close friend of Augustus, and Augustus' daughter Julia the Elder. Nero's paternal grandparents were Nero Claudius Drusus (Drusus the Elder) and Antonia Minor, daughter of Mark Antony and Octavia Minor. Nero was born around AD 6 to Germanicus and Agrippina the Elder. Their deaths allowed for the adoption and ascension of their younger brother, Caligula, following the death of Tiberius in AD 37. His brother Drusus also died in exile in AD 33.

Two years later, he died in exile on the island of Ponza. In AD 29, Tiberius wrote a letter to the Senate attacking Nero and his mother, and the Senate had them both exiled. As the power of Sejanus grew, other members of the imperial family began to fall as well.

Sejanus, prefect of the Praetorian Guard, had become powerful in Rome and is believed by ancient writers such as Suetonius and Tacitus to have been responsible for the downfall of Drusus the Younger.

As a result of being heirs of the emperor, he and his brother enjoyed accelerated political careers. After the deaths of his father and of Tiberius' son, Drusus the Younger, Nero and his brother Drusus were adopted together by Tiberius in September AD 23. Born into the prominent Julio-Claudian dynasty, Nero was the son of Tiberius' general and heir, Germanicus. AD 6–31) was the adopted grandson and heir of the Roman Emperor Tiberius, alongside his brother Drusus. Nero Julius Caesar, National Archaeological Museum of Tarragona

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