Marquesses | Titles by Rank
- Marquesses of Casa Tilly
- Marquesses of Casa Torres
- Marquesses of Casa Tremañes
- Marquesses of Casa Valdés
- Marquesses of Casa Villavicencio
- Marquesses of Casablanca
- Marquesses of Casafuerte
- Marquesses of Casafuerte
- Marquesses of Casal de Los Griegos
- Marquesses of Casalbore
- Marquesses of Casalnuovo
- Marquesses of Casares
- Marquesses of Casariego
- Marquesses of Casasola
- Marquesses of Cascais
- Marquesses of Casciolino
- Marquesses of Casciolino
- Marquesses of Casinas
- Marquesses of Cassine
- Marquesses of Cassis
- Marquesses of Castañeda
- Marquesses of Castañiza
- Marquesses of Castel Bravo
- Marquesses of Castel Rigattini
- Marquesses of Castel-Moncayo
- Marquesses of Castelar
- Marquesses of Castelbuono
- Marquesses of Castelfuerte
- Marquesses of Castelgoffredo
- Marquesses of Castell de Torrent
- Marquesses of Castell-Florite
- Marquesses of Castellane
- Marquesses of Castellanos
- Marquesses of Castellar de la Sierra
- Marquesses of Castellbell
- Marquesses of Castelldosríus
- Marquesses of Castellmeya
- Marquesses of Castellnou
- Marquesses of Castellón
- Marquesses of Castelmoron
- Marquesses of Castelnouvel
- Marquesses of Castelnovo
- Marquesses of Castelnuovo
- Marquesses of Castelnuovo Scrivia
- Marquesses of Castelo Melhor
- Marquesses of Castelo Novo
- Marquesses of Castelo Rodrigo
- Marquesses of Castelromano
- Marquesses of Castelvetere
- Marquesses of Castiglione