Madog ap Gruffudd, or Madog ap Gruffudd Maelor, was a Prince of Powys FadogLloyd, Jacob Youde W. (1881). The history of the princes, the lords marcher, and the ancient nobility of Powys Fadog, Oxford University, p. 158 from 1191 to 1236 in north-east Wales, and Lord of Powys.Pierce, T. J., (1959). MADOG ap GRUFFYDD (died 1236) lord of Powys. Dictionary of Welsh Biography. Retrieved 4 Aug 2023, from https://biography.wales/article/s-MADO-APG-1236 He was the founder of Valle Crucis Abbey in the Lordship of Yale.
Early life He was elder son of Prince Gruffydd Maelor and his wife, Angharad, a daughter of King Owain Gwynedd. He succeeded his father jointly with his brother, Owen, in 1191 and on Owen's death in 1197 became the sole ruler of Powys north of the River Rhaeadr and the Afon Tanat.
Madog consolidated the possessions of his father, Prince Gruffudd Maelor, and the territory he ruled became known as Powys Fadog (Fadog in Welsh is a lenited form of his name, Madog) in his honour, the remainder of the old kingdom formed Powys Wenwynwyn. After his death in 1236, this area—comprising Welsh and English Maelor, Ial (Yale), Cynllaith, Nanheudwy and Mochnant Is Rhaeadr—was still referred to as Powys Fadog although it was divided up between his five sons.
Madog was close to his cousin, prince Llywelyn ap Iorwerth, initially, but gradually distanced himself and also kept aloof from 1212 when his cousin had managed to reform the Welsh Confederacy and looked instead to King John of England, in whose pay he was, as an official ally of the English king. By 1215 he decided to ally with his cousin and remained so.
Establishment of and burial at Valle Crucis Abbey
On 28 January 1201, Madog founded the Cistercian abbey of Valle Crucis Abbey, Llangollen, Wales. The abbey was founded with monks from nearby Strata Marcella abbey.
He is buried at Valle Crucis Abbey in the abbey church, as are several of Madog's descendants. The exact site of his burial is unknown.D.H. Evans BA, FSA - Valle Crucis Abbey (2008)
He is an ancestor of Owain Glyndŵr, Prince of Wales.Pierce, T. J., (1959). OWAIN GLYNDWR (c. 1354 - 1416), 'Prince of Wales', Dictionary of Welsh Biography. Retrieved 7 Mar 2024
Marriage and children He had married Esyllt (Isolda). He had issue:
Gruffudd Maelor II, who succeeded his father, Gruffudd Iâl, died 1238 Maredudd, died 1256 Hywel, died 1268 Madog Fychan, died 1269 Angharad. Her father tried to marry her to Fulk, son of Marcher Lord Fulk FitzWarin.
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