Gaius Julius Caesar

Cleopatra bore Caesar a son - Ptolemy Caesar, commonly known as Caesarion.

An excerpt from the article 30 facts about Gaius Julius Caesar

He was the last ruler of ancient Egypt and was killed on Octavian Augustus' orders when he invaded Egypt in 30 BC. Likely, Cleopatra was also assassinated on Octavian's orders, although according to Plutarch she committed suicide.