Britannia

• Kingdoms
• 

  Kingdom of Ailech

• 

  Kingdom of Tyrconell

• 

  Kingdom of Breifne

• 

  Kingdom of Connacht

• 

  Kingdom of Deheubarth

• 

  Kingdom of Desmond

• 

  Kingdom of England

• Alo.svg

  Kingdom of Gwent

• Gwynedd.svg

  Kingdom of Gwynedd

• 

  Kingdom of Ireland

• Isle of Man.svg

  Kingdom of the Isles

• 

  Kingdom of Leinster

• 

  Kingdom of Morgannwg

• 

  Kingdom of Powys

• 

  Kingdom of Scotland

• 

  Kingdom of Thomond

• Duchies
• 

  Duchy of Lancaster

• 

  Duchy of York

• Lordships
• 

  Lordship of Ireland

• Mac Dougall Ancient.svg

  Lordship of the Isles

• Principalities
• 

  Principality of Powys Fadog

• 

  Principality of Powys Wenwynwyn

• Earldoms
• 

  Earldom of Derby

• 

  Earldom of Orkney