Augustus, called at first Caius Octavius, ultimately Caius Julius Cæsar Octavianus, the first of the Roman Emperors or Cæsars, grand-nephew of Julius Cæsar, and his heir; joined the Republican party at Cæsar's death, became consul, formed one of a triumvirate with Antony and Lepidus; along with Antony overthrew the Republican party under Brutus and Cassius at Philippi; defeated Antony and Cleopatra at Actium, and became master of the Roman world; was voted the title of "Augustus" by the Senate in 27 B.C.; proved a wise and beneficent ruler, and patronised the arts and letters, his reign forming a distinguished epoch in the history of the ancient literature of Rome (63 B.C.-A.D. 14).

Augustus, the name of several princes of Saxony and Poland in the 16th and 17th centuries.