Duchy of Brittany
- Ruling Houses
-
House of de Cornouaille
-
House of Eudon II de Porhoët
-
House of de Penthièvre
-
House of Thouars
-
House of Dreux
-
House of Pierre I of Dreux
-
House of Jean I de Dreux
-
House of Jean III of Dreux
-
House of de Montfort
-
House of Valois
- Counties
-
- Viscounties
-
-
-
-
- Lordships
-
-
-
-
-
-
