Nero Claudius Drusus Germanicus, commonly known in English as Drusus the Elder, was a Roman general and politician. He was a patrician Claudian, but his mother was from a plebeian family. He was the son of Livia Drusilla and the stepson of her second husband, the Emperor Augustus. He was also the brother of the Emperor Tiberius; the father of the Emperor Claudius and general Germanicus; paternal grandfather of the Emperor Caligula, and maternal great-grandfather of the Emperor Nero.