The Norse Dark Elves have many partial manifestations in D&D. However, the Drow are the second closest etymologically (the first being the now defunct Xvart). However, many evil underground races are one or two degrees of myth removed from the people of Svartalfheim. Therefore, one cannot simply take the Drow to be Norse dark elves. I agree with EternalKnight that the Dark Elves of D&D are as much Gary Gygax as they are Norse folklore.
Every campaign should come up with its own origin story for the cleavage between the Dark Elves and their above ground cousins. That's what I've done in mine and I see no point in there being any level of agreement amongst DMs as to their origin.
So, unless you want to run a Fimblewinter or other clearly Norse campaign, create an origin, don't research it.
Every campaign should come up with its own origin story for the cleavage between the Dark Elves and their above ground cousins. That's what I've done in mine and I see no point in there being any level of agreement amongst DMs as to their origin.
So, unless you want to run a Fimblewinter or other clearly Norse campaign, create an origin, don't research it.