Gwenllian, daughter of Gruffudd ap Cynan of Gwynedd and wife of Gruffudd ap Rhys of Deheubarth, led a Welsh army to attack Kidwelly Castle while her husband was in the north. She was defeated by Maurice de Londres and beheaded. Her son Morgan was killed and another son Maelgwn captured. She became Wales's greatest female warrior-martyr. The cry "Revenge for Gwenllian!" inspired the Welsh uprising of 1136. The field north of Kidwelly is still called Maes Gwenllian (Field of Gwenllian).
Gwenllian killed and beheaded; son Morgan killed
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