Language and Naming in Brittonic in the Early Medieval Period

Sometime before C6 the closely related South-western British and Western British languages started to look less like Gaulish and more like the modern p-Celtic languages, and Cornish, Welsh, Breton and Cumbric (extinct) began taking shape as modern European languages. Cornish and Breton (from South-western British) eventually diverged from each other during the last part of the Early Medieval Period.

There will have been dialectic differences in these regions of Brittonic usage as well as differences in naming practice between them, but the structure and many name elements of Early Cornish personal names broadly follows that of early names found in Britain, Ireland, Gaul and Celt-Iberia. It is these names that have come down (with modification) to Cornish today including well known names such as Arthur, Gerent and Winwaloe.