Oh yes, and just to confuse things, it is quite possible for someone to hold different titles in different ranks, for example ;

The Heir to the British Throne, Prince Charles, is also ;
      Prince of Wales

       Duke of Cornwall

       Duke of Sutherland

         Earl of Carrick

          Earl of Chester

          Baron Renfrew

                  Lord Of The Isles

            Great Steward Of Scotland

       which means that technically, Camilla is a double Duchess, a double Countess, and a Baroness ; how greedy can you get ?? !!      
          Baron Hardon