Marquesses | Titles by Rank
- Marquesses of Pianezza e Livorno
- Marquesses of Piatti
- Marquesses of Pickman
- Marquesses of Pico de Velasco de Angustina
- Marquesses of Pidal
- Marquesses of Piedra Blanca de Guana
- Marquesses of Piennes
- Marquesses of Pierre
- Marquesses of Pietracatella
- Marquesses of Pietraforte
- Marquesses of Pilares
- Marquesses of Piles
- Marquesses of Pins et Montbrun
- Marquesses of Piovera
- Marquesses of Pisoniano
- Marquesses of Pizzolli
- Marquesses of Pleurre
- Marquesses of Poggio Boldavenetti
- Marquesses of Poitiers
- Marquesses of Polavieja
- Marquesses of Polignac
- Marquesses of Pomares
- Marquesses of Pombal
- Marquesses of Pomereu d' Aligre
- Marquesses of Ponceno
- Marquesses of Pons
- Marquesses of Pont-à-Mousson
- Marquesses of Ponta Delgada
- Marquesses of Pontac
- Marquesses of Ponte do Lima
- Marquesses of Pontoi-Camus de Pontcarré
- Marquesses of Populonia
- Marquesses of Portago
- Marquesses of Portazgo
- Marquesses of Porto Seguro
- Marquesses of Portugalete
- Marquesses of Pouzols
- Marquesses of Povar
- Marquesses of Poviglio
- Marquesses of Powis
- Marquesses of Poza
- Marquesses of Pozas
- Marquesses of Pozo Rubio
- Marquesses of Pozoblanco
- Marquesses of Pracomtal
- Marquesses of Prado
- Marquesses of Prado
- Marquesses of Prado Alegre
- Marquesses of Praia and Monforte
- Marquesses of Pranzac