Iestyn ap Gwrgan
| Iestyn ap Gwrgant King of Morgannwg |
|
|---|---|
Armorial Bearings of Gwrgant
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| Reign | 1081-1093 |
| Coronation | 1081 |
| Predecessor | Caradog ap Gruffydd |
| Hereditary | Extinct |
| Born | 1014 Morgannwg, Wales |
| Died | 1093 Llangenyw, Denbighshire, Wales |
| Consort | Constance verch Cadwgon |
| Wife |
|
| Issue | Catrin verch Iestyn Madog ap Iestyn Caradog ap Iestyn Rhys ap Iestyn Nest verch Iestyn Gwenllian verch Iestyn |
| Welsh | Brythonic Branch |
| House | Morgannwg |
| Father | Gwrgant ab Ithel |
| Mother | MissVerch Gwerystan |
Iestyn ap Gwrgant [ˈjɛstɪn ap ˈgʊrgant] (or Jestyn ap Gwrgant) (English: Justin, son of Gwrgant) (c. 1045 – 1093) was the last ruler of the Welsh kingdom of Morgannwg, which encompassed the counties of Glamorgan and Monmouthshire.
Iestyn ap Gwrgant was the last ruler of the royal house of Morgannwg, which had a lineage stretching back over five centuries to Tewdrig (c. 550–584). The members of this royal house had links to the other royal houses of Wales through marriage, and were descendants of the celebrated Rhodri Mawr. Iestyn ap Gwrgant's base is believed to have been at Dinas Powys, south west of Cardiff.
Iestyn probably ruled Morgannwg for a little less than a decade (c. 1081–1090) and is believed to have built castles in the regions of Cardiff and Kenfig. The popular version of historical events is that Iestyn, following a dispute with his rival Einion ap Collwyn, invited Robert Fitzhamon and his twelve knights into the region to settle the matter. Naturally, once invited in, they refused to leave. He was deposed c. 1090 by Norman ruler Robert Fitzhamon, lord of Gloucester, who established a lordship based in Cardiff and subsequently conquered the lowlands of Glamorgan (the Vale of Glamorgan), which was parcelled out to his followers. The mountainous parts of Glamorgan were left in Welsh control. Caradog ap Iestyn, the eldest son of Iestyn ap Gwrgant, was the only Welsh lord to retain lands in the Glamorgan lowlands after Fitzhamon had conquered them. He retained the land between the River Neath and the River Afan, and he and his descendants were known as the "lords of Afan." His descendants are thought to include the Williams family of Aberpergwm.
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