Cleopatra VII Philopator (Late 69 BC to August 12, 30 BC) was an ancient Greek queen and the last pharaoh of Ancient Egypt. She was a member of the Ptolemaic dynasty, a Greek royal family which ruled Egypt after Alexander the Great's death during the Hellenistic period. The Ptolemies, throughout their dynasty, spoke Greek and refused to learn Egyptian, which is the reason that Greek as well as Egyptian languages were used on official court documents like the Rosetta Stone. By contrast, Cleopatra learned Egyptian and represented herself as the reincarnation of an Egyptian goddess Isis. Cleopatra originally ruled jointly with her father Ptolemy XII Auletes and later with her brothers, Ptolemy XIII and Ptolemy XIV, whom she married as per Egyptian custom, but eventually she became sole ruler. As pharaoh, she consummated a liaison with Julius Caesar that solidified her grip on the throne. She later elevated her son with Caesar, Caesarion, to co-ruler in name.