Gaius Octavius was a name used for men among the gens Octavia. Gaius was one of the four chief praenomina used by the Octavii, the other three being Gnaeus, Marcus and Lucius. The most celebrated member was the dictator Gaius Julius Caesar's great-nephew and adoptive son, who later became the first Roman Emperor, famously known as Augustus. Gaius Octavius also refers to men from several families of the gens Octavia: Relatives of Augustus, member of the so-called Octavii Rufi: Members of other families: