Gaius Octavius (proconsul)

Gaius Octavius (about 100 – 59 BC) was an ancestor to the Roman Emperors of the Julio-Claudian dynasty. He is the father of the Emperor Augustus, step-grandfather of the Emperor Tiberius, great-grandfather of the Emperor Claudius, great-great grandfather of the Emperor Caligula, and great-great-great grandfather of the Emperor Nero. Hailing from Velitrae, he descended from an old, wealthy equestrian branch of the gens Octavia. Despite being from a wealthy family, his family was plebeian, rather than patrician. As a novus homo ("new man"), he would not be of a senatorial family.

His grandfather, Gaius Octavius, fought as a military tribune in Sicily during the Second Punic War. His father Gaius Octavius was a municipal magistrate who lived to an advanced age. He is a distant relative (possibly as third cousins, through their ancestor Gnaeus Octavius Rufus) to Gnaeus Octavius, the consul of 87 BC who led the opposition to Lucius Cornelius Cinna.

Octavius' first wife was named Ancharia. The two had a child (named Octavia Major). It is not known how the marriage ended, although it is possible that Ancharia died during child birth. He later married the niece of Julius Caesar, Atia Balba Caesonia. How they met is not known, although Atia's family on her father's side (the Balbi) lived close to Velitrae, which was the ancestral home of the Octavii. They had two children: Octavia Minor and the Emperor Augustus, the latter of whom was born in 63 BC.

Octavius was elected quaestor, believed to have been in 70 BC. In 61 BC, he was elected praetor. In 60 BC, after his term had ended, he was appointed propraetor, and was to serve as governor (praefectus pro praetor) of Macedonia. Before he left for Macedonia, the senate sent him to put down a slave rebellion at Thurii. These slaves had previously taken part in the rebellions of Spartacus and Catiline. He then left for Macedonia and proved a capable administrator, governing "courageously and justly", his deeds included leading the Roman forces to victory in an unexpected battle against the Thracian Bessian tribe. Cicero had high regard for his diplomatic dealings. Because of his successful term as governor of Macedonia, he won the support necessary to be elected consul.

In 59 BC, Octavius sailed to Rome, to stand for election as consul. However, he died in Nola, before arriving in Rome. He supposedly died in the same bedroom where his son Augustus would pass away many years later. His career is summarized in an inscription erected by his son on the forum he built in Rome:

Since the last Gaius Octavius (Augustus) was adopted by his great-uncle Julius Caesar and become one of the Julii Caesares, the family's original nomen gentile was not descended to his only daughter (i.e. Julia the Elder) and adopted sons (i.e. Gaius Caesar, Lucius Caesar, Tiberius, Agrippa Postumus), which end the Octavii Rufi's male line.