Viscounts | Titles by Rank
- Viscounts of Rouen
- Viscounts of Rougé
- Viscounts of Rouge
- Viscounts of Roulers
- Viscounts of Rouy
- Viscounts of Ruães
- Viscounts of Rueda
- Viscounts of Sá da Bandeira
- Viscounts of Sabará
- Viscounts of Sabóia
- Viscounts of Sacavém
- Viscounts of Safira
- Viscounts of Sagres
- Viscounts of Saint-Dizier
- Viscounts of Saint-Genys
- Viscounts of Saint-Leon
- Viscounts of Sainte-Maure
- Viscounts of Salgado
- Viscounts of Salignac-Fénelon
- Viscounts of Salreu
- Viscounts of Salto
- Viscounts of Samodães
- Viscounts of San Enrique
- Viscounts of San Germán
- Viscounts of San Julián
- Viscounts of Sanches de Baena
- Viscounts of Sanches de Frias
- Viscounts of Sanchez
- Viscounts of Sande
- Viscounts of Sanderval
- Viscounts of Santa Catarina
- Viscounts of Santa Clara de Avedillo
- Viscounts of Santa Cruz
- Viscounts of Santa Cruz do Bispo
- Viscounts of Santa Eulália
- Viscounts of Santa Isabel
- Viscounts of Santa Isabel
- Viscounts of Santa Luzia
- Viscounts of Santa Margarida
- Viscounts of Santa Maria de Arrifana
- Viscounts of Santa Marinha
- Viscounts of Santa Marinha da Trindade
- Viscounts of Santa Marta
- Viscounts of Santa Mónica
- Viscounts of Santa Quitéria
- Viscounts of Santa Rita
- Viscounts of Santa Teresa
- Viscounts of Santa Vitória
- Viscounts of Santana
- Viscounts of Santarém