After Julius Caesar was assassinated in 44 BC, it was revealed in his willfather, Lucius Marcus Philippus, advised him not to. Caesar’s will also contained a clause about nominating guardians for his son, should he have one. Thus, it is possible that he had drawn up his will at a time when he had hoped to have a son of his own, and not just adopted Octavian. Consequently, Cleopatra may have used this clause to try and have Caesarion named Caesar’s heir.
