Armorica

Armorica or Aremorica is the name given in ancient times to the part of Gaul between the Seine and Loire rivers, that includes the Brittany peninsula, extending inland to an indeterminate point and down the Atlantic coast. The toponym is based on the Gaulish phrase are-mori "on/at [the] sea", made into the Gaulish place name Aremorica (*are-mor-ika ) "Place by the Sea". The suffix -ika was first used to create adjectival forms and then, names (see regions such as Pays d'Ouche from Utica and Perche from Pertica). The original designation was vague, including a large part of what became Normandy in the 10th century and, in some interpretations, the whole of the coast down to the Garonne river. Later, the term became restricted to Brittany.