Turjan said:That's correct.
I think most of the D&D races are just born from the need for monsters of different HD in the "good old times" when monsters did not advance in levels/HD. The question with the PC races has already been answered, with Tolkien as the source for the blueprint of all of them (except gnomes). In mythology, elfs, dwarfs, gnomes, brownies and goblins are all the same. The terms are used interchangeably. Nordic mythology basically knows only elfs and trolls as big archetypes.
Interesting... may I ask what were elves and trolls in nordic mythology like?