Iestyn ap Gwrgant (or Jestyn ap Gwrgant) (Welsh: 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.
Read more about Iestyn Ap Gwrgant: Lineage, Norman Invasion, Succession, Modern Interpretation