Gaius Octavius (d. 59 BC) was the biological father of Caesar Augustus. He descended from an old, wealthy equestrian family, of whom he was the first to enter the Roman senate. His grandfather fought as a middle-ranking officer in the Second Punic War. His father was a municipal magistrate who lived to an advanced age. Like his father, he bribed voters during elections. After his praetorship, he was commissioned by the senate to assist in the suppression of Spartacus' slave revolt. He subsequently became governor of Macedonia, where he proved a capable administrator. He governed "courageously and justly", winning a battle against a Thracian tribe. Cicero had high regard for his diplomatic dealings. Octavius died on his way to stand for the consulship in Rome in 59 BC. By his first wife, Ancharia , he fathered Octavia Major; by his second, Atia Balba Caesonia, he fathered Octavia Minor and Augustus.

Source

Suetonius, Augustus, vs. 1-8