Scottish mythology, actually. The word 'trow' or 'drow' refers to a type of troll, goblin or malevolent elf in the folklore of the Shetland Isles, which are part of the north-east of Scotland. They do also take a degree of influence from the ideas of 'svartalfar' in Norse mythology.
Which may very well just be dwarves.
Spriggan's Den - Thoughts on Sword & Sorcery, RPGs, and some of my personal creations.
Originally Posted by Galloglaich
DnD is basically a comic book superhero game set in an alternate reality more related to a Renaissance Faire than any actual history or mythology from the real world.