Not just British folklore, but also Norse and Germanic, which could be considered ancestors of of British folklore (as the British Isles contained people descended from those cultures regions.) Also those three places are the countries/regions that I think most exemplify 'whiteness', in so far as it exists, so it makes sense that they would also be included.
Yeah poor choice of words on my part, but LoTR drew from British folklore and was at least partially supposed to be a sort of unified English myth
Not just British folklore, but also Norse and Germanic, which could be considered ancestors of of British folklore (as the British Isles contained people descended from those cultures regions.) Also those three places are the countries/regions that I think most exemplify 'whiteness', in so far as it exists, so it makes sense that they would also be included.