Julia the Younger sibling Lucius Caesar
Unusual naming
Julia the Younger was not a member of the Julian gens by birth: being the daughter of Marcus Vipsanius Agrippa made her a Vipsania Agrippina by birth, although there are no contemporary sources that show that that name was ever used for her. She came to belong to the household of the Julio-Claudian dynasty as she was raised and instructed by her maternal grandfather Augustus. Further, Augustus adopted Tiberius as his son (and heir), while Tiberius was remarried to Julia the Elder. Augustus became something of a paternal grandfather to Julia the Elder's children, too, including Julia the Younger. A formal adoption "in the family of the Caesars" among the offspring of Agrippa and Julia the Elder is however only recorded regarding Vipsania Julia's brothers Gaius Vipsanius Agrippa—hence Gaius Julius Caesar—and Lucius Vipsanius Agrippa—hence Lucius Julius Caesar. Her younger sister Agrippina the Elder and youngest full brother, Marcus Vipsanius Agrippa Postumus, were named after their natural father only until Agrippa Postumus was adopted by Augustus as Agrippa Julius Caesar. Likewise, her eldest half-sisters, Vipsania Agrippina, Vipsania Attica, Vipsania Marcella and Vipsania Marcellina, were named after their father. Her younger half-brother, unnamed in contemporary sources, was later sometimes dubbed "Tiberillus," after his father Tiberius, and died young.
brother or sister kin