A country encompassing what is now parts of France and Belgium, across the sea from Britain. In Geoffrey, Arthur conquers it as part of his invasion of Gaul and defeat of Frollo. Arthur and his host sailed from Sandwich to war against Lucius, landing at Barflete (Barfleur) in Flanders.
Later, King Holdin ruled it under Arthur. In the Vulgate Lancelot, he wrestles it from Count Aran, who ruled it under Claudas.
A knight named Bloyas came from this region.
Flanmesgues | The Legend of King Arthur