9th century in Wales
This article is about the particular significance of the century 801–900 to Wales and its people.
Events
830- Approximate date – Nennius's Historia Brittonum
- Merfyn ap Rhodri succeeds his father Rhodri the Great as king of Powys, reigning until his own death in c.900
- Spring – Battle of Buttington, a victory for a joint Anglo-Saxon and Welsh force against the Vikings; the Buttington Oak, planted about this time, perhaps to commemorate the event, falls in 2018
- Autumn – Danish Vikings are forced from Chester into Wales.
Births
854- Cadell ap Rhodri, King of Seisyllwg
Deaths
808- Cadell ap Brochfael, king of Powys
- Elfodd, bishop of Gwynedd, who persuaded the Welsh church to adopt the Roman method of determining the date of Easter
- Merfyn Frych, king of Gwynedd
- Cyngen ap Cadell, king of Powys
- Gwgon, king of Ceredigion and Ystrad Tywi
- Rhodri the Great, king of Gwynedd and most of Wales