Prince Bernadotte was an hereditary title in the Nobility of Belgium, conferred upon Carl Bernadotte (the former Prince Carl of Sweden, Duke of Östergötland) by Leopold III of Belgium on 6 July 1937. In Sweden, the Belgian princely Bernadotte family was part of the unintroduced nobility and members of Ointroducerad Adels Förening. The title is now extinct, as Carl Bernadotte had no male line heirs.
The title was a noble title (i.e. prince as a high rank of nobility), not a royal title.