Ri Arthgal map Dumnagual

Ri Arthgal map Dumnagual is the monarch of Kingdom of Alt Clut. He starts as the lord of Dun Breatann.

Wikipedia has an article on this subject at:
Arthgal ap Dyfnwal

Kingdom of Alt Clut
Monarch:	Claimant:
Ri Arthgal map Dumnagual	None
Vassals:
Mael Rhun map Arthgal • Mael Echou map Rhun • Guledic Dyfnwal map Rhun • Guledic Giric Map Rath Mael Cynon map Cyndrwyn • Mael Gwion map Cyndrwyn • Mael Madoc map Cadell • Mael Caradoc map Riwall
Ladies:
Brifael • Ceindrych • Morgawse • Verh Cinaed