the Early Middle Ages, suggesting that it was much farther to the east than it is now, near Nantes and Rennes. For example, Pleugueneuc, in Ille-et-Vilaine, combines the Breton element plou (parish) with the name 'Guehenoc'.

The distinction of two Brittanys was made at least as early as the 15th century, when the names used were Britannia gallicana (Upper