Ptolemy XV Philopator Philometor Caesar (23 June 47 BCE – 13 August 30 BCE), better known as Caesarion (Latin: Little Caesar), was the last Pharaoh of Ptolemaic Egypt. He was the eldest son of Queen Cleopatra VII, and the alleged and thus only biological son of Roman Consul Gaius Julius Caesar, after whom he was named.
He was the final member of the Ptolemaic dynasty of Egypt, who reigned jointly with his mother, from September 2, 44 BC. He held the position of sole ruler between the death of Cleopatra, on August 12, 30 BC, up to August 23, 30 BC, the time his death was ordered by Octavian, Caesar's great-nephew and official heir, who would become the Roman emperor Augustus.
It is unknown whether Octavian's order was carried out successfully, but the emperor's young rival subsequently vanished from history.