Nero Claudius Drusus Germanicus (January 14, 38 BC – Summer of 9 BC), born Decimus Claudius Drusus also called Drusus Claudius Nero, Drusus, Drusus I, Nero Drusus, or Drusus the Elder was a Roman politician and military commander. He was a patrician Claudian on his legal father's side but his maternal grandmother was from a plebeian family. He was the son of Livia Drusilla and the legal stepson of her second husband, the Emperor Augustus. He was also brother of the Emperor Tiberius, father to both the Emperor Claudius and general Germanicus, paternal grandfather of the Emperor Caligula, and maternal great-grandfather of the Emperor Nero.