A intriguing coincidence, given the supposed rivalry between the foster-brothers. But then again, Rameses was a regnal name, taken at his ascension to the throne, and his family may well have known him by a different one. King Edward VII was always known as 'Bertie' within the family, just as Edward VIII was 'David'. The current Prince of Wales has four given names, and could take any one of them as his regnal name.