Marquesses | Titles by Rank
- Marquesses of Bowmont and Cessford
- Marquesses of Brackley
- Marquesses of Bradomín
- Marquesses of Brancaleone
- Marquesses of Brantes
- Marquesses of Breadalbane
- Marquesses of Bremond d' Ars
- Marquesses of Brenes
- Marquesses of Bretanha
- Marquesses of Breteuil
- Marquesses of Brézé
- Marquesses of Brienza
- Marquesses of Brignole-Sale
- Marquesses of Brindis
- Marquesses of Brissac
- Marquesses of Bristol
- Marquesses of Broissia
- Marquesses of Broons
- Marquesses of Brun
- Marquesses of Bruzac
- Marquesses of Bucchianico
- Marquesses of Buckingham
- Marquesses of Buen Suceso
- Marquesses of Buenavista
- Marquesses of Buniel
- Marquesses of Busca
- Marquesses of Busianos
- Marquesses of Busseto
- Marquesses of Bussy
- Marquesses of Bustamante
- Marquesses of Bute
- Marquesses of Buzzaccarini de Vetulis
- Marquesses of Caballero
- Marquesses of Caballino
- Marquesses of Cabanes
- Marquesses of Cabra
- Marquesses of Cábrega
- Marquesses of Cabriñana del Monte
- Marquesses of Cabris
- Marquesses of Caccavone
- Marquesses of Cáceres
- Marquesses of Cadaval
- Marquesses of Cadimo
- Marquesses of Cadreita
- Marquesses of Caiazzo
- Marquesses of Caicedo
- Marquesses of Calanda
- Marquesses of Caldas de Montbuy
- Marquesses of Calderon de la Barca
- Marquesses of Caleruega