Gruffudd ap Rhydderch

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Gruffudd ap Rhydderch

Death: circa 1056 (37-54) (killed by Gruffudd ap Llewelyn)
Immediate Family:

Son of Rhydderch ap Iestyn
Husband of N.N.
Father of Caradog ap Gruffudd
Brother of Caradog ap Rhydderch

Managed by: Eric Bradford Owrutsky
Last Updated:
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Immediate Family

About Gruffudd ap Rhydderch

Please see Darrell Wolcott: The Battle of Mynydd Carn; (Steven Ferry, May 26, 2020.)

Please see Darrell Wolcott: Trahaearn ap Caradog of Arwystli; (Steven Ferry, July 7, 2020.)

Please see Darrell Wolcott: Two Families Headed by a Rhydderch ap Iestyn; (Steven Ferry, July 18, 2020.)

Please see Darrell Wolcott; The First Wife of Bleddyn ap Cynfyn; (Steven Ferry, July 23, 2020.)

Please see Darrell Wolcott: King of England Mediates Welsh Dispute; (Steven Ferry, August 21, 2020.)

Please see Darrell Wolcott: The 'Next Heir' of Morgan of Caerleon; (Steven Ferry, September 18, 2020.)


Gruffydd ap Rhydderch (d. AD 1055) was a king of Gwent and part of the kingdom of Morgannwg in south Wales and later king of Deheubarth.

Gruffydd was the son of Rhydderch ab Iestyn who had been able to take over the kingdom of Deheubarth from 1023 to 1033. He received the lordship of Caerleon in 1031 and strengthened its fortifications.[1] Already king of part of Morgannwg, Gruffydd became involved with Deheubarth when that kingdom was taken over from Hywel ab Edwin by Gruffydd ap Llywelyn, already king of Gwynedd, in 1044. Gruffydd ap Rhydderch was however able to expel him in 1045 and became king of Deheubarth himself. He was said to be a powerful king who stoutly resisted raids by the Danes and attacks by Gruffydd ap Llywelyn. In 1055 however Gruffydd ap Llywelyn killed him in battle and recaptured Deheubarth.

In 1049 he is reported raiding up the River Severn in alliance with an Irish Viking Fleet.[2]

His son Caradog ap Gruffydd (who received Caerleon in 1057[1]) also attempted to emulate his father and grandfather by gaining control of Deheubarth but was killed at the Battle of Mynydd Carn.

The first in this line was RHYDDERCH ap IESTYN, whose origins are unknown but who came to power in Glamorgan, as we saw in Welsh Princes 1-2. By 1023 he was strong enough to seize control of Deheubarth from the descendants of HYWEL DDA, but he died in 1033, killed by the Irish (Maund pp.61-2, J.Davies p.99). His son GRUFFUDD ap RHYDDERCH was unable to hold on to his lands, and it was not until 1045 that he had sufficient control of Glamorgan and Monmouthshire to recapture his father’s place in Deheubarth. He resisted the Danes and attacked the English border, but he was defeated and killed by Gruffudd ap Llywelyn in 1055.

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Gruffudd ap Rhydderch's Timeline