Arthurian legend is very mixed up because it has been contributed to by so many authors. Monmouth's version doesn't have any grail legends or the famous sword. These were additions by Mallory and De Troyes.
The word 'Celt' is a misnomer since this is what the Greeks and Roman s called unconquered people and those who they thought were barbaric. Perhaps the right term should be Iberi and Galli and they represent a migratory movement from across Central and South Asia, the Middle East, Eastern Europe and across to the British Isles and Spain. Hence the legend of the Hebrews, the Iberian mountains of the Caucasus, the Apiru and Habiru orf Egypt and Phoenicia, Bharat (India) and the Britons, the Iberians of Spain, Romanian gypsies, the Galli of Mesopotamia, Turkey (eg. Galatians), France and Spain (eg. Galacia). As the early civilisations of Egypt, Mesopotamia and India fell into ruin and became torn by war people moved towards Europe in waves that became collectively larger as they passed. The migration still occurs to this day.
The word 'Celt' is a misnomer since this is what the Greeks and Roman s called unconquered people and those who they thought were barbaric. Perhaps the right term should be Iberi and Galli and they represent a migratory movement from across Central and South Asia, the Middle East, Eastern Europe and across to the British Isles and Spain. Hence the legend of the Hebrews, the Iberian mountains of the Caucasus, the Apiru and Habiru orf Egypt and Phoenicia, Bharat (India) and the Britons, the Iberians of Spain, Romanian gypsies, the Galli of Mesopotamia, Turkey (eg. Galatians), France and Spain (eg. Galacia). As the early civilisations of Egypt, Mesopotamia and India fell into ruin and became torn by war people moved towards Europe in waves that became collectively larger as they passed. The migration still occurs to this day.