Marquesses | Titles by Rank
- Marquesses of Ariañy
- Marquesses of Arianza
- Marquesses of Arias Navarro
- Marquesses of Arienzo
- Marquesses of Ariño
- Marquesses of Ariza
- Marquesses of Arjona
- Marquesses of Arlanza
- Marquesses of Armendáriz
- Marquesses of Armentières
- Marquesses of Armunia
- Marquesses of Arneva
- Marquesses of Arriluce de Ybarra
- Marquesses of Arronches
- Marquesses of Artasona
- Marquesses of Arucas
- Marquesses of Asprillas
- Marquesses of Assche
- Marquesses of Assérac
- Marquesses of Assigliano
- Marquesses of Astorga
- Marquesses of Atalaya Bermeja
- Marquesses of Atalayuelas
- Marquesses of Atarfe
- Marquesses of Atella
- Marquesses of Atholl
- Marquesses of Aubignan
- Marquesses of Audiffret-Pasquier
- Marquesses of Aulencia
- Marquesses of Auñón
- Marquesses of Áustria
- Marquesses of Avaugour
- Marquesses of Avella
- Marquesses of Avessens de Saint-Rome
- Marquesses of Ávila and of Bolama
- Marquesses of Avilés
- Marquesses of Avola
- Marquesses of Ayamonte
- Marquesses of Aycinena
- Marquesses of Ayerbe
- Marquesses of Ayguesvives de Malaret
- Marquesses of Aymerich
- Marquesses of Ayseau
- Marquesses of Aytona
- Marquesses of Bacares
- Marquesses of Baependi
- Marquesses of Baglion
- Marquesses of Bagnasco
- Marquesses of Bagneux
- Marquesses of Bagnuli