Final answer:
The Roman emperors were known by the title 'Emperor,' derived from Julius Caesar and later embraced by all emperors.
Explanation:
Emperor was the title known by the Roman emperors, derived from the leader Julius Caesar, and later adopted by all emperors. Julius Caesar's successor, Octavius, became the first emperor of Rome and adopted the name Augustus Caesar.
Augustus was recognized as the founder of the Roman Empire, establishing a dynastic rule that led to the formation of dynasties like the Julio-Claudian Dynasty and the Flavian Dynasty.
After Augustus, subsequent emperors held titles like Augusti and Caesars within the Roman imperial system.
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