The name and settlement of Brittany are connected here to migration from Britain after Roman rule. People from the southwest, especially around Cornwall, crossed to Armorica as Anglo-Saxon settlement changed Britain. A brief follow-up identifies Frankish migration as part of the explanation for Armorica's relative depopulation. In this account, that depopulation provided room for refugees from Britain.
Notable Point · 2:16:45-2:17:18
How migration from Britain helped form Brittany
Migration from post-Roman Britain into Armorica explains the connection between Britain and Brittany in this short historical aside.