Conceptual Development: The earliest form of this name was ᴹQ. Laiqeldar (SM/270), because at the time Tolkien used Eldar as a generic term for Elves. This version contained an earlier Quenya word for “green”: ᴹQ. laiqa. The name changed to ᴹQ. Laiqendi when Tolkien revised his naming scheme for Elves (LR/176, Ety/LÁYAK). The name retained this form into the published version of The Silmarillion, despite the change of ᴹQ. laiqa >> Q. laica (PE17/84), though later it could have derived the “qu” from the element Quendë.
laiquendicollective name. Green-elves
quendë noun "Elf", the little-used analogical sg. of Quendi, q.v. (KWEN(ED), WJ:361)