Clarification. The title of Roman "Emperor" was coined after Caesar's Death, when Octavius (or Cesar Augustus) came to power. Julius Cesar was always a Consul and Dictator of Rome.
Cleopatra the Seventh, while she was the Egyptian Pharaoh of the time, her lineage was actually greek. When the Macedonian Empire of Alexander the Great collapsed, Egypt gained independence under the Ptolemaic dynasty (Ptolome, one of Alexander's followers was the first one). With the years, the Plolemaic dinasty fell in decadency, been greed, incompetence and incest the common point. Cleopatra the Seventh being the most beutifull and cunning woman and ruler of the classic world is actually a miracle, considering her family.