Overview
The Kingdom of Dumnonia was a Brythonic kingdom in southwestern Britain, existing in Sub-Roman Britain. Founded around 400 CE, it was centered in the area of modern Devon, also including Cornwall and part of Somerset. Its eastern boundary shifted westward due to the expansion of the Anglo-Saxon kingdom of Wessex. The kingdom dissolved around 927 CE. The name Dumnonia shares a linguistic relationship with the Breton region of Domnonée.
Historical Periods
Dumnonia (602–704)
602 CE – 704 CE
Capital: Isca DumnoniorumArea: 14,349 km²
Dumnonia (705–709)
705 CE – 709 CE
Capital: Isca DumnoniorumArea: 14,349 km²