Dumnonia

castle in Cornwall, England, UK

Dumnonia (, in the adjective form), a Latinised name, was a Brythonic kingdom that existed in Sub-Roman Britain between the 6th century CE and the 7th century CE in the more westerly parts of present-day South West England.

The Dumnonii or Dumnones were a British tribe who inhabited Dumnonia, the area now known as Cornwall and Devon (and some areas of present-day Dorset and Somerset) in the further parts of the South West peninsula of Britain, from at least the Iron Age up to the early Saxon period. They were bordered to the east by the Durotriges tribe.

Roman settlement in Devon, England, UK

Domnonée is the modern French form of Domnonia or Dumnonia (Latin for "Devon"; ), a historic kingdom in northern Armorica (modern Brittany). It was founded by British immigrants from Dumnonia in Sub-Roman Britain who fled the Saxon invasions of Britain in the early Middle Ages. Headed by the same ruling dynasty, Domnonée was at times separate from, and at other times united with, its British motherland, and the Latin name Domnonia was applied to both regions interchangeably. On the continent, Domnonée encompassed the areas of Trégor, Dol-de-Bretagne, Goélo, and Penthièvre.

Digain (also known as Dygain) was a 5th-century Welsh saint and Prince of Dumnonia (now the English West Country). thumb|Church of Saint Digain|St Digain's Church, [[Llangernyw]]