Caesarion was born in Egypt on 23 June 47 BC. His mother, Cleopatra, said that he was the son of Roman leader Julius Caesar. Even though he looked and acted like Caesar, Caesar did not officially say that he was his son. One of Caesar’s friends, Gaius Oppius, wrote a small book trying to show that Caesar could not have been Caesarion’s father. But it is possible that Caesar let Caesarion use his name.