Person

Iestyn ap Gwrgant

11th century · 11th century

Iestyn ap Gwrgant was the last native king of Morgannwg, or Glamorgan, in south-east Wales in the late 11th century. Around 1090 he was overthrown by the Norman Robert Fitzhamon, who built a castle at Cardiff and created the marcher Lordship of Glamorgan. Later Welsh tradition blamed Iestyn for inviting the Normans in, and several Glamorgan families claimed descent from him.

Iestyn ap Gwrgant
Image: AlexD · CC BY-SA 3.0 · Wikimedia Commons

Mentioned in 2 state histories

Kingdom of MorgannwgLordship of Glamorgan

See also

Cite this entry
APA
The Epoch Institute. (2026). Iestyn ap Gwrgant. In The Epoch Institute Encyclopedia. https://the-epoch-institute.org/encyclopedia/iestyn-ap-gwrgant
MLA
“Iestyn ap Gwrgant.” The Epoch Institute Encyclopedia, The Epoch Institute, 2026, https://the-epoch-institute.org/encyclopedia/iestyn-ap-gwrgant. Accessed .
Chicago
The Epoch Institute. “Iestyn ap Gwrgant.” The Epoch Institute Encyclopedia. 2026. https://the-epoch-institute.org/encyclopedia/iestyn-ap-gwrgant.
Harvard
The Epoch Institute (2026) ‘Iestyn ap Gwrgant’, The Epoch Institute Encyclopedia. Available at: https://the-epoch-institute.org/encyclopedia/iestyn-ap-gwrgant (Accessed: ).

Last reviewed October 2026Random entry ↻