Drusus was a cognomen in Ancient Rome, and may refer to: Drusus Caesar - was the son of Germanicus, also called Drusus III. Gaius Livius Drusus was consul in 147 BC. Julius Caesar Drusus was the son of Tiberius, also called Drusus II or Drusus Minor. Marcus Livius Drusus was the name of two Republican politicians, a father and son Marcus Livius Drusus Claudianus was the father of Livia. Marcus Livius Drusus Libo was consul in 15 BC. Marcus Scribonius Libo Drusus was a grandson of Pompey, a… (More on Drusus)