Dukes | Titles by Rank
- Dukes of Berry
- Dukes of Berwick-E
- Dukes of Berwick-EN
- Dukes of Beuvron
- Dukes of Biron
- Dukes of Bisaccia
- Dukes of Bisceglie
- Dukes of Bivona-E
- Dukes of Bivona-I
- Dukes of Blacas
- Dukes of Boémia
- Dukes of Boiano
- Dukes of Bolton
- Dukes of Bomarzo
- Dukes of Bonfornello
- Dukes of Bordeaux
- Dukes of Bouillon
- Dukes of Bourbon
- Dukes of Bournonville
- Dukes of Bovalino
- Dukes of Bovino
- Dukes of Brabant
- Dukes of Bracciano
- Dukes of Bragança
- Dukes of Branciforte
- Dukes of Brandon
- Dukes of Breslau
- Dukes of Bridgewater
- Dukes of Bridgwater
- Dukes of Brieg
- Dukes of Brissac
- Dukes of Brittany
- Dukes of Broglie
- Dukes of Brontè
- Dukes of Brunswick
- Dukes of Brunswick-Bevern
- Dukes of Brunswick-Calenberg
- Dukes of Brunswick-Dannenberg
- Dukes of Brunswick-Gifhorn
- Dukes of Brunswick-Göttingen
- Dukes of Brunswick-Grubenhagen
- Dukes of Brunswick-Grubenhagen-Einbeck
- Dukes of Brunswick-Grubenhagen-Herzberg
- Dukes of Brunswick-Harburg
- Dukes of Brunswick-Herzberg
- Dukes of Brunswick-Lüneburg
- Dukes of Brunswick-Lüneburg-Celle
- Dukes of Brunswick-Lüneburg-Dannenberg
- Dukes of Brunswick-Lüneburg-Everstein
- Dukes of Brunswick-Lüneburg-Gifhorn