Gaius Octavius (about 100 – 59 BC) was an ancestor to the Roman Emperors of the Julio-Claudian dynasty. He was the father of the Emperor Augustus, step-grandfather of the Emperor Tiberius, great-great grandfather of the Emperor Caligula, great-grandfather of the Emperor Claudius, and great-great-great grandfather of the Emperor Nero. He descended from an old, wealthy equestrian branch of the Octavii family. Despite being from a wealthy family, his family was plebeian, rather than patrician. As a novus homo ("new man"), he was not 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 was distantly related to Gnaeus Octavius, the consul of 87 BC who led the opposition to Lucius Cornelius Cinna.
Read more about Gaius Octavius: Personal Life, Political Career