:Dyffryn Clwyd

{{Short description|Welsh medieval cantref}}

{{Use dmy dates|date=April 2022}}

{{for|modern-day uses as a Welsh name|Vale of Clwyd}}

Dyffryn Clwyd was a cantref of Medieval Wales and from 1282 a marcher lordship. In 1536, it became part of the new county of Denbighshire. The name means Vale of Clwyd in English and is still the name for that region of north Wales in modern Welsh. Dyffryn Clwyd was one of the cantrefi of Perfeddwlad, and itself was made up of three commotes, Colion, Dogfeiling and Llannerch.The Welsh Academy Encyclopaedia of Wales. John Davies, Nigel Jenkins, Menna Baines and Peredur Lynch (2008) p. 230 {{ISBN|978-0-7083-1953-6}}

The lordship was granted in 1282 to Reginald de Grey, 1st Baron Grey de Wilton,The Welsh Academy Encyclopaedia of Wales. John Davies, Nigel Jenkins, Menna Baines and Peredur Lynch (2008) p. 334 {{ISBN|978-0-7083-1953-6}} Justice of Chester and Edward I's commander for his campaign of 1282 into north Wales. The lordship remained in the Grey family until Richard Grey, 6th Baron Grey de Ruthyn, 3rd Earl of Kent sold it to Henry VII in 1508.