Brittia (Βριττία), according to Procopius, was an island known to the inhabitants of the Low Countries under Frankish rule (viz. the North Sea coast of Austrasia), corresponding both to a real island used for burial and a mythological Isle of the Blessed, to which the souls of the dead are transported. Procopius relates that "A garbled account", observed Loyn "possibly an echo of a report by a Frankish ambassador or an Angle in the ambassador's entourage". The name may arise from the Breton name of Brittany, Breizh.