Marcus Livius Drusus Claudianus was a senator and praetor of the Roman Republic. He was born with the name Appius Claudius Pulcher, into the patrician family of the Claudii Pulchri but adopted by a Livius Drusus as a small child. His daughter Livia Drusilla became the wife of the first Roman Emperor Augustus, and he was a direct ancestor of the Julio-Claudian emperors Tiberius, Caligula, Claudius and Nero.