Dyffryn Clwyd was a cantref of Medieval Wales and from 1282 a marcher lordship.
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.
[1] The lordship was granted in 1282 to Reginald de Grey, 1st Baron Grey de Wilton,[2] Justice of Chester and Edward I's commander for his campaign of 1282 into north Wales.
This article about a location in Wales is a stub.