the Elder). His last marriage was with Livia, a Claudia who had been married to a Claudius. Their son Tiberius, by birth a Claudius, was later adopted by Augustus, thus, like his stepfather Augustus, becoming one of the Julii Caesares by adoption. Antonia Minor's generation Antonia Minor's husband Nero Claudius Drusus, a.k.a. Drusus the Elder, was a Claudian like his brother emperor Tiberius: they were the sons of Tiberius Claudius Nero, the praetor of 42 BC. Agrippina the Elder's generation Without son, Augustus had adopted his grandsons (by his only daughter Julia) Gaius, Lucius and Postumus, and his stepson Tiberius, in order to ensure an heir and successor. Around the time of his death only Tiberius remained and he became the next emperor. Tiberius, a Claudius by birth had become one of the Julii Caesares by adoption: from this moment this first dynasty of Roman emperors was both Julian and Claudian. The further emperors of this dynasty had both Julian and Claudian ancestors. Agrippina the Younger's generation Caligula was the last emperor adopted into the family of the Julii Caesares. He was a Claudius by descendance, although he had Julii Caesares among his ancestors, from both his mother's and his father's side. Most marriages remained childless and many potential successors in the dynasty were eliminated after rampant accusations. Claudius, the fourth emperor of the Julio-Claudian dynasty, was a brother to Caligula's father Germanicus. He belonged to the gens Claudia with, from his mother's side, Julian ancestors. Poppaea Sabina's generation Nero, the last emperor of the dynasty, was by birth a Domitius with as well Julian ancestors (from both his mother's as his father's side), as Claudian (from his mother's side). He became a Claudian himself, by adoption by his stepfather emperor Claudius, a brother to his grandfather from his mother's side, or, from his father's side, a son of his grandmother's sister. Citations General and cited sources Miriam Griffin. A Companion to Julius Caesar, p. 13 ff. John Wiley & Sons, 2009. . (Julius Caesar's descendancy.) Antony Kamm. Julius Caesar: A Life, pp. 156 (Genealogical chart of the family of Julius Caesar) and 157 (Simplified genealogical chart of the emperors from Augustus to Nero). Routledge, 2006. . J. W. Meijer (translator). Tacitus: Jaarboeken (Ab excessu divi Augusti Annales). Ambo, 1990. – pp. 511 (Julia the Elder's family tree), 532 (Tiberius' family tree), 576–577 (from Gaius Julius Caesar the Elder to