Rhys ap Tewdwr

king of Deheubarth

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July 13, 2026

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Rhys ap Tewdwr was the king of Deheubarth, a kingdom in southwestern Wales. During his reign, Norman advances into Wales were ongoing. While there was a period of relative stability and a possible agreement with William I of England that recognized Rhys's authority, the Normans continued to push into Welsh territories. Rhys ap Tewdwr died in 1093 while resisting the Norman invasion of Brycheiniog. His grandson, Rhys ap Gruffudd, later managed to regain recognition of his position from Henry II, ruling a significant dominion in Deheubarth, though Norman control of some southern coastal areas persisted. Deheubarth, along with Gwynedd and Powys, formed a distinct sphere of Welsh political influence by the late 12th century.12

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Wales
Norman infiltration
…suggesting that King William and Rhys ap Tewdwr, king of Deheubarth (died 1093), made a compact that recognized the Welsh ruler’s authority in his own kingdom and perhaps also his influence in those other areas of southern Wales outside Deheubarth, particularly Morgannwg and Brycheiniog, that still lay outside Norman control.…
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…suggesting that King William and Rhys ap Tewdwr, king of Deheubarth (died 1093), made a compact that recognized the Welsh ruler’s authority in his own kingdom and perhaps also his influence in those other areas of southern Wales outside Deheubarth, particularly Morgannwg and Brycheiniog, that still lay outside Norman control.…
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