Julia Drusilla
Gaius Julius Caesar (named in honour of his famous relative) was born in Antium (modern Anzio and Nettuno) on 31 August 12 AD, the third of six surviving children born to Germanicus and his second cousin Agrippina the Elder, who was the daughter of Marcus Vipsanius Agrippa and Julia the Elder; making her the granddaughter of Augustus. Gaius had two older brothers, Nero and Drusus, as well as three younger sisters, Agrippina the Younger, Julia Drusilla and Julia Livilla. He was also a nephew of Claudius, Germanicus' younger brother and the future emperor.