Gaius Octavius
Atia Balba Caesonia, the daughter of Julius Caesar's sister, married Gaius Octavius: they became the parents of the first emperor of the Julio-Claudian dynasty, then still called Octavianus. Their daughter Octavia the Younger became an ancestor to the last three emperors of that dynasty. In this generation Mark Antony had children by, among others, Antonia Hybrida Minor, and Fulvia.