Britannia

• Kingdoms
• 

  Kingdom of Deheubarth

• 

  Kingdom of England

• Kingdom of Gwynedd

  Kingdom of Gwynedd

• 

  Kingdom of Mann and the Isles

• 

  Kingdom of Morgannwg

• Kingdom of Mann

  Kingdom of Mann

• 

  Kingdom of Powys

• 

  Kingdom of Rhwng Gwy a Hafren

• 

  Kingdom of Scotland

• Lordships
• Lordship of the Isles

  Lordship of the Isles

• Principalities
• 

  Principality of Powys Fadog

• 

  Principality of Powys Wenwynwyn

• Republics
• 

  Commonwealth of England