Marquesses | Titles by Rank
- Marquesses of Santa Maria de Silvela
- Marquesses of Santa María del Villar
- Marquesses of Santa Marina
- Marquesses of Santa Marta
- Marquesses of Santa Olalla
- Marquesses of Santa Rita
- Marquesses of Santa Sofia
- Marquesses of Santaella
- Marquesses of Santarém
- Marquesses of Santasilia di Torpino
- Marquesses of Santiago
- Marquesses of Santiago de Oropesa
- Marquesses of Santillana
- Marquesses of Santo Amaro
- Marquesses of Santo Domingo
- Marquesses of Santo Domingo de Guzmán
- Marquesses of Santo Floro
- Marquesses of Santos
- Marquesses of São João da Palma
- Marquesses of São João Marcos
- Marquesses of São Miguel
- Marquesses of São Paio
- Marquesses of São Tiago
- Marquesses of São Vicente
- Marquesses of Saporta
- Marquesses of Sapucaí
- Marquesses of Sardoal-e
- Marquesses of Sargadelos
- Marquesses of Sarria
- Marquesses of Sarrial
- Marquesses of Sauceda
- Marquesses of Sauvebeuf
- Marquesses of Savona
- Marquesses of Ségur
- Marquesses of Ségur-Lamoignon
- Marquesses of Seignelay
- Marquesses of Seilhac
- Marquesses of Selva Alegre
- Marquesses of Selve de Sarran
- Marquesses of Sentmenat
- Marquesses of Septème
- Marquesses of Serdañola
- Marquesses of Sérignac
- Marquesses of Serre
- Marquesses of Serrezuela
- Marquesses of Sesimbra
- Marquesses of Sesmaisons
- Marquesses of Sévérac
- Marquesses of Sévigné
- Marquesses of Sierra Bullones