Princes | Titles by Rank
- Princes of Modena
- Princes of Mohylanka
- Princes of Moldávia
- Princes of Molfetta
- Princes of Monaco
- Princes of Monforte
- Princes of Montauban
- Princes of Montbazon
- Princes of Monte Rotondo
- Princes of Monte Rotondo
- Princes of Montecompatri
- Princes of Montefeltro della Rovere
- Princes of Monteleone
- Princes of Montemiletto
- Princes of Montenegro
- Princes of Montenuovo
- Princes of Montereale
- Princes of Monteroduni
- Princes of Montesalso
- Princes of Montesarchio
- Princes of Montleart
- Princes of Montmorency
- Princes of Morávia
- Princes of Morea
- Princes of Moreia
- Princes of Morocco
- Princes of Mortagne
- Princes of Moscovo
- Princes of Musignano
- Princes of Nápoles
- Princes of Nassau
- Princes of Nassau-Dietz
- Princes of Nassau-Dillenburg
- Princes of Nassau-Hadamar
- Princes of Nassau-Idstein
- Princes of Nassau-Orange
- Princes of Nassau-Sarrebrücken
- Princes of Nassau-Siegen
- Princes of Nassau-Usingen
- Princes of Nassau-Weilburg
- Princes of Nettuno
- Princes of Neuchâtel
- Princes of Niscemi
- Princes of Noer
- Princes of Noia
- Princes of Noruega
- Princes of Novgorod
- Princes of Oettingen-Oettingen
- Princes of Oettingen-Spielberg
- Princes of Oettingen-Wallerstein