Marquesses | Titles by Rank
- Marquesses of Reguer
- Marquesses of Reguer
- Marquesses of Reinosa
- Marquesses of Remauville
- Marquesses of Remiencourt
- Marquesses of Rende
- Marquesses of Renel
- Marquesses of Renty
- Marquesses of Reriz
- Marquesses of Resende
- Marquesses of Resves
- Marquesses of Retortillo
- Marquesses of Revilla
- Marquesses of Revilla de la Cañada
- Marquesses of Reynel
- Marquesses of Rialp
- Marquesses of Riano
- Marquesses of Riants
- Marquesses of Riantz
- Marquesses of Rianzuela
- Marquesses of Ribeira Grande
- Marquesses of Richebourg
- Marquesses of Richelieu
- Marquesses of Riestra
- Marquesses of Rifes
- Marquesses of Rilly d' Oisonville
- Marquesses of Rincon de San Ildefonso
- Marquesses of Rio Maior
- Marquesses of Ríocabado
- Marquesses of Rioflorido
- Marquesses of Riofreddo
- Marquesses of Riofreddo
- Marquesses of Riparbella
- Marquesses of Ripert-Barret
- Marquesses of Ripon
- Marquesses of Riscal de Alegre
- Marquesses of Rivas
- Marquesses of Rivas Cacho
- Marquesses of Rivas de Jarama
- Marquesses of Rive
- Marquesses of Rivera de Tajuña
- Marquesses of Robien
- Marquesses of Robledo de Chavela
- Marquesses of Robrero
- Marquesses of Rocamora
- Marquesses of Roccagiovine
- Marquesses of Roccagiovine
- Marquesses of Roccaguglielma
- Marquesses of Roccalumera
- Marquesses of Roccasecca