Princes | Titles by Rank
- Princes of Pons
- Princes of Porcean
- Princes of Porcia
- Princes of Preslaw
- Princes of Prossedi
- Princes of Prussia
- Princes of Quadt de Wykradt-Isny
- Princes of Raffadali
- Princes of Rasina
- Princes of Resuttano
- Princes of Riccia
- Princes of Riviano
- Princes of Robech
- Princes of Robeq
- Princes of Roccafiorita
- Princes of Roccaromana
- Princes of Roccasecca dei Volsci
- Princes of Roccella
- Princes of Rochefort
- Princes of Rohan
- Princes of Rohan-Guéméné
- Princes of Rohan-Rochefort
- Princes of Roménia
- Princes of Rossano
- Princes of Rubempré
- Princes of Ruffano
- Princes of Rügen
- Princes of Sachsen-Gessaph
- Princes of Said
- Princes of Salerne
- Princes of Salerno
- Princes of Salm
- Princes of Salm-Horstmar
- Princes of Salm-Kyrburg
- Princes of Salm-Reifferscheidt
- Princes of Salm-Reifferscheidt-Krautheim and Dyck
- Princes of Salm-Reifferscheidt-Krautheim-Dyck
- Princes of Salm-Reifferscheidt-Raitz
- Princes of Salm-Salm
- Princes of San Donato
- Princes of San Faustino
- Princes of San Faustino
- Princes of San Giorgio
- Princes of San Giuseppe
- Princes of San Gregorio
- Princes of San Lorenzo
- Princes of San Martino in Rio
- Princes of San Mauro
- Princes of San Nicandro
- Princes of San Polo