During the reign of Queen Victoria it was the Victorian era. Then Edwardian, Georgian and currently Elizabethan. What era comes next? (Assuming Charles takes the throne). And what is after that? (I think I know the first, but have no idea of the second.
The adjective from 'Charles' is 'Caroline'. (Yes, I know that is also a girl's name, but it is still true!) Thus, if he stays as Charles, we will be in a Caroline Period and if he does, indeed, change to George, we will be in yet another Georgian Age.