Armorica

The last Breton will have died before our Armorica shall be conquered by the barbarians as they have done the rest of Gaul.
The Poniard's Hilt|Eugne Sue
Armoric, ar-mor′ik, n. the language of the inhabitants of Armorica, the ancient name for Brittany.
Chambers's Twentieth Century Dictionary (part 1 of 4: A-D)|Various
The vast lands of his almost royal abbey bordered on the frontiers of Armorica.
The Carlovingian Coins|Eugne Sue
They contented themselves with leaving Armorica devastated and stripped of her bravest defenders.
The Carlovingian Coins|Eugne Sue

Arvor (or Armor) is one of the bardic equivalents of Armorica, as Brittany is called in many old tales.
The Divine Adventure etc. (Works vol. 4)|Fiona Macleod

British Dictionary definitions for Armorica

Armorica

/ (ɑːˈmɒrɪkə) /

noun

an ancient name for Brittany

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012