Cleopatra had a son.
Ptolemy XV Philopator Philometor Caesar ( [ Πτολεμαῖος ΙΕʹ Φιλοπάτωρ Φιλομήτωρ Καῖσαρ , links = no ] , Ptolemaios IEʹ Philopatōr Philomētōr Kaisar ; [ Ptolemaeus XV Philopator Philomētor Caesar , links = no ] June 23 , 47 BC -- August 23 , 30 BC ) , better known by the nicknames Caesarion ( [ sᵻˈzɛəriən ] English : Little Caesar ; [ Caesariō , links = no ] ) and Ptolemy Caesar ( [ ˈtɒlᵻmi_ˈsiːzər ] [ Πτολεμαῖος Καῖσαρ , links = no ] , Ptolemaios Kaisar ; [ Ptolemaeus Caesar , links = no ] ) , was the last Pharaoh of Egypt . He was the final member of the Ptolemaic dynasty of Egypt , who reigned jointly with his mother Cleopatra VII of Egypt , from September 2 , 44 BC . He was the eldest son of Cleopatra VII , and possibly the only biological son of Julius Caesar , after whom he was named . Cleopatra . She later elevated Caesarion , her son with Caesar , to co-ruler in name . She was outlived by Caesarion , who was declared pharaoh by his supporters , but he was soon killed on Octavian 's orders .