The second Hellenistic dynasty, the Ptolemies, ruled Egypt from 305 BC until Egypt became a province of Rome in 30 BC. If two dates overlap, that means there was a co-regency. The most famous member of this dynasty was Cleopatra VII. In modern times she is known simply as Cleopatra. She was the consort of Julius Caesar and after Caesar's death, of Mark Antony, and had children with both of them. Cleopatra tried to create a dynastic and political union between Egypt and Rome. This failed with the assassination of Caesar and the defeat of Mark Antony. Caesarion (Ptolemy XV Philopator Philometor Caesar) was the last king of the Ptolemaic dynasty of Egypt. He reigned jointly with his mother Cleopatra VII of Egypt, from September 2, 47 BC. He was the eldest son of Cleopatra VII, and possibly the only son of Julius Caesar, after whom he was named. Between Cleopatra's death on August 12, 30 BC, up to his own death on August 23, 30 BC, he was the sole pharaoh. It is tradition that he was hunted down and killed on the orders of Octavian, who would become the Roman emperor Augustus, but there is no evidence.