Powys

A kingdom in North Wales. The lands of Teyrnllwg stretch as far south as the Brycheiniog.
Ruled by the Gwertherion dynasty, a family claiming descent jointly from the marriage of Vortigern and Princess Sevira, the daughter of Magnus Maximus.
Location of Viroconium Cornoviorum
Also: Teyrnllwg
Kings of Powys
Vortigern 
Cadeyrn Fendigaid
Cadell Ddyrnllwg 
Rhuddfedel Frych
Cyngen Glodrydd
Pasgen ap Cyngen
Morgan ap Pasgen
Brochwel Ysgithrog 
Cynan Garwyn