It was incorporated into Flintshire following Edward I of England's conquest of northern Wales in the 13th century.
The cantref formed the eastern part of Perfeddwlad (or Y Berfeddwlad) on the northern coast of Wales between the River Clwyd and Deeside.
Comprising the three commotes of Rhuddlan, Prestatyn and Coleshill (Cwnsyllt),[2] the territory originally formed part of the Kingdom of Gwynedd until, in the late 8th century, it was conquered by the Anglo-Saxon Kingdom of Mercia.
[2] He was succeeded as lord of Tegeingl by his son Owain who supported the Anglo-Normans' invasion of North Wales in the 1090s.
[4] It then changed hands several times between England and Gwynedd,[5] but was eventually seized by Edward I as part of his conquest of the Principality of Wales between 1277 and 1283.