"In the Dragonlance setting, dark elves are not a separate subrace of elves (in fact, the drow of other worlds do not exist on this one). In this setting, "dark elf" is a label given to any elf that is outcast from elven society, typically (although not always) for evil practices."
"It should be noted that in the Forgotten Realms setting Dark-elf is not entirely synonymous with Drow. As explained on pages 54-56 of the supplement Lost Empires of Faerun by Richard Baker et al., the dark-elves were a subrace of elves and the majority were not inherently evil. Actions of the dark-elves of Ilythiir during the Second and Fourth Crown Wars led the other elven kingdoms to perform powerful ritual changing all of the dark-elves into drow. "The word dhaerow—which meant traitor—was likewise corrupted to 'drow,' which became the name of the corrupted dark-elves. Why all the dark elves, and not just the Ilythiiri, were transformed into drow remains one of the enduring mysteries of the Descent" (56)." http://en.wikipedia.org/wiki/Dark_Elves_in_fiction
These are in fact both Drow. The one with the crown is a first generation Drow and Imperial Daughter. The other, I am not sure what generation she is but I want to wager a guess that she is somewhere around a second generation Drow. What this means is that they are 1 and 2 generations removed from their Dark Elf ancestors. In the case of the one with the crown her mother was a Dark Elf. In the others case I am assuming that her grandmother was a Dark Elf, but I am uncertain of this.Their names are Snadhya'runes (the one with the Crown) and Mel'arnach (the other one)