Rhufoniog

Rhufoniog was a small sub-kingdom of the Dark Ages Gwynedd, and later a cantref in medieval Wales.

Sometimes the two cantrefi were linked together as "Rhos and Rhufeiniog", which roughly corresponds to the territory of the old county of Denbighshire.

The rivers Elwy, Clwyd and Clywedog formed a natural border to the north and east.

According to tradition, it was ruled by its eponymous founder Rhufon, the third son of the first King of Gwynedd, Cunedda, and his direct descendants from the year 445 until the year 540 when it was probably absorbed back into direct control of Gwynedd proper.

The cantref was given to the prince Dafydd ap Gruffudd in 1277, then on his death five years later, it was given to Henry de Lacy, 3rd Earl of Lincoln.