RM
Rhodri Mawr King of Wales
Vitals
Died
878
Family
Children
About
Rhodri Mawr, Rhodri the Great, united most of Wales under one ruler for the first time, holding Gwynedd, Powys and Seisyllwg together against both the Vikings and the Mercians. He was killed by the English in 878. He stands at the historical horizon of this family's Welsh descent.
Research notes
✓ DOCUMENTED at the historical horizon (web-confirmed 25 Jul 2026): RHODRI MAWR ('Rhodri the Great', c.820-878), KING OF GWYNEDD, Powys and Seisyllwg - the first to unite most of Wales under one ruler; killed by the Saxons 878. Father of Cadell (our line). *** THE WELSH ROYAL SUMMIT: above him the line runs to Merfyn Frych and into legend (note-only). Direct ancestor - a crowned King of Wales. Added 25 Jul 2026.