Well, according to Wikipedia (yeah, I know) there is a Bonapartist pretender to the French throne. He is Charles Napoleon, styled Napoleon VII, Prince Imperial.
Not that it really makes any difference.
I guess he will just have to get in line.
Bonaparte was a Corsican commoner. When he made himself Emperor of France, he made all his brothers and sisters Prince and Princesse. This the many Prince and Princesse Napoleon in today’s Gotha.