Pomponia Graecina the emperor Caligula and Agrippina the Younger, who was the mother of Nero and wife of Claudius. Other notable ancestors on her mother's side include the historian and senator Gaius Asinius Pollio, who was consul in 40 BC. Pomponia married Aulus Plautius (d. by 65 AD), the senator and general who led the Roman conquest of Britain in 43 AD, for which he later received a military ovation, and who governed Roman Britain until 47 AD. A younger Aulus Plautius, probably their son, was murdered by the emperor Nero, supposedly because Nero's mother Agrippina had fallen in love with him
Agrippina the Younger first marriage to praetor Tiberius Nero, and was the Emperor Tiberius's younger brother and Augustus's stepson. In the year 9, Augustus ordered and forced Tiberius to adopt Germanicus, who happened to be Tiberius's nephew, as his son and heir. Germanicus was a favorite of his great-uncle Augustus, who hoped that Germanicus would succeed his uncle Tiberius, who was Augustus's own adopted son and heir. This in turn meant that Tiberius was also Agrippina's adoptive grandfather in addition to her paternal great-uncle. Agrippina was born on 6 November in AD 15, or possibly 14, at Oppidum Ubiorum, a Roman outpost on