Caesarion

Ptolemy XV Caesar (; Ancient Greek: Πτολεμαῖος Καῖσαρ, Ptolemaios Kaisar; 47 BC – late August 30 BC), nicknamed Caesarion (Greek: Καισαρίων, Kaisaríōn, "Little Caesar"), was the last pharaoh of the Ptolemaic Kingdom of Egypt, reigning with his mother Cleopatra VII from 44 BC to 30 BC. He nominally reigned as sole pharaoh for a few days after his mother's death, although Alexandria had already fallen and Caesarion remained in hiding until his execution by Octavian, who would become the first Roman emperor as "Augustus".

Caesarion was the eldest son of Cleopatra and was the only known biological son of Julius Caesar, after whom he was named. He was the last sovereign member of the Ptolemaic dynasty, and the last pharaoh of Ancient Egypt, ending more than 3,000 years of traditional kingship.

Source: Wikipedia — https://en.wikipedia.org/wiki/Caesarion