Julius Caesar/Origin

The name
Basically, all male members of the patrician family Julii Caesares were named Julius Caesar, among those men were the famous dictator Gaius Julius Caesar and his grandnephew and adopted son Gaius Julius Caesar Octavianus (who then became known as Augustus, the first Emperor of Roma).

Gaius Julius Caesar the dictator
Gaius Julius Caesar (July 100 BC – 15 March 44 BC) was a military commander, politician and author at the end of the Roman Republic.

Caesar became a member of the First Triumvirate, and when that broke up he fought a civil war against Pompey the Great. Winning the war, Caesar became Dictator for life of the Roman Republic. He was assassinated by his enemies in Rome.