Britannia
- Kingdoms
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Kingdom of Ailech
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Kingdom of Tyrconell
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Kingdom of Breifne
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Kingdom of Ceredigion
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Kingdom of Connacht
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Kingdom of Deheubarth
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Kingdom of Desmond
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Kingdom of Gwent
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Kingdom of Gwynedd
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Kingdom of Ireland
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Kingdom of the Isles
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Kingdom of Leinster
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Kingdom of Morgannwg
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Kingdom of Powys
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Kingdom of Thomond
- Duchies
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Duchy of York
- Lordships
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Lordship of Ireland
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Lordship of the Isles
- Principalities
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Principality of Powys Fadog
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Principality of Powys Wenwynwyn
- Earldoms
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Earldom of Derby
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Earldom of Orkney
