That would be Cleopatra who was queen from 51 - 30 B.C.
It was Cleopatra. In actual fact, this was a power play on Cleopatra's part. She became the lover of the most powerful man in Rome to avert the possibility of a Roman invasion of Egypt. The affair was also an alliance between Egypt and the man who dominated Roman politics. Had the Romans decided to invade, Egypt would not have been able to stand up to Roman military might.
He probably wanted to be sure to remember who they were so he could have his revenge on them later.
Cleopatra failed Egypt because she had hoped Julius Caesar and later Marc Anthony would keep Egypt strong. But Caesar's nephew defeated Marc Anthony and killed Cleopatra's family.
If you mean the Roman leader who was the nephew of Julius Caesar and his adopted son, it was Octavian, later known as Augustus Caesar.
Julius Caesar had been in love with the Egyptian queen Cleopatra. Caesar and she had a child based on their romantic relationship. Later, Caesar's friend Mark Antony fell in love with Cleopatra and they were married in Egypt.
Octavius Caesar, Julius Caesar's adopted son, defeated Marc Anthony. He later became the first emperor of Rome, Emperor Augustus.
Julius Caesar was succeeded by a triumvirate (three person rule); Mark Antony, Marcus Lepidus and Octavian who later became caesar and changed his name to Augustus.
Julius Caesar was murderd on the 15th of March, 44BC, also known then as the Ides of March. his funeral was held a few days later.
It was his nephew, Octavien, later renamed Augustus.
Gaius Julius Octavius (Octavian). He was formerly Caesar's grand-nephew. Octavian would later become the First Emperor of Rome: Augustus
In Shakespeare's play Julius Caesar, Caesar is murdered in the Senate at the begining of Act III. Caesar's ghost later returns to warn Brutus that he will die at Philippi - a warning that Brutus seems neither surprised, nor much troubled by.
While the early part of the story centres on Caesar, the later part of the play focuses on Brutus.