Julia Drusilla
Nero was born around AD 6 to Germanicus and Agrippina the Elder. Nero's paternal grandparents were Nero Claudius Drusus (Drusus the Elder) and Antonia Minor, daughter of Mark Antony and Octavia Minor. His maternal grandparents were Marcus Vipsanius Agrippa, a close friend of Augustus, and Augustus' daughter Julia the Elder. Nero had seven siblings: four brothers (Tiberius and Gaius Julius, who died young; Drusus Caesar; and Gaius, nicknamed "Caligula") and three sisters (Agrippina the Younger, Julia Drusilla, and Julia Livilla).