Princes | Titles by Rank
- Princes of Lampedusa
- Princes of Larderia
- Princes of Larderia
- Princes of Lascari e Torretta
- Princes of Laurenzano
- Princes of Lauro
- Princes of Lauro and Marzano
- Princes of Leiningen
- Princes of Leiningen-Dagsburg-Hartenburg
- Princes of Leonforte
- Princes of Leporano
- Princes of Liechtenstein
- Princes of Liège
- Princes of Ligne
- Princes of Lippe
- Princes of Lippe-Biesterfeld
- Princes of Lippe-Weissenfeld
- Princes of Listenois
- Princes of Lobkowicz
- Princes of Lobkowicz (Horín/Mìlník)
- Princes of Looz and Corswaren
- Princes of Lorena
- Princes of Löwenstein-Wertheim-Freudenberg
- Princes of Löwenstein-Wertheim-Rosenberg
- Princes of Löwenstein-Wertheim-Virneburg
- Princes of Lucinge
- Princes of Luxemburg
- Princes of Luzzi
- Princes of Lynar
- Princes of Maida
- Princes of Maiorca
- Princes of Mamikonids
- Princes of Massa
- Princes of Masserano
- Princes of Mazzano
- Princes of Mazzano
- Princes of Meca
- Princes of Mecklenburg
- Princes of Mecklenburg-Güstrow
- Princes of Mecklenburg-Parchim
- Princes of Mecklenburg-Rostock
- Princes of Melfi
- Princes of Melito
- Princes of Merode
- Princes of Metternich-Winneburg
- Princes of Metternich-Winneburg-Beilstein
- Princes of México
- Princes of Mexico
- Princes of Militello
- Princes of Mirto