Today they exist in the form of Dark Eldar, Craftworld Eldar, Harlequins and Exodites.
Etymology and Inspiration Edit
The word "Eldar" was used in Tolkien's fantasy legendarium as the elfish word for elves. Eldar most likely comes from the word Elder, Elves being the elder species of a past generation.
Dark Millennium Edit
Nothing about Eldar has been officially mentioned thus far. Eldar are part of Warhammer 40,000's original 5 factions; the only two factions from this list to have not been featured are the Tyranids and Eldar.
"Exodite Eldar" were listed as playable faction on Wikipedia for most of 2011. The claim was unreferenced and has since been removed.