Eol the Nando

[Tar Elenion]

Originally Posted by William Cloud Hicklin

Aha!

It's from the Lhammas and QS '37 (HME V:175, 263):

"The Green-elves, who were called in their own tongue Danas, the followers of Dan... this folk was in the beginning of Noldorin race, but is not counted among the Eldar, nor yet among the Lembi. For they followed Orome at first, but...."

"There [in Ossiriand] dwelt the Danian Elves, who in the beginning were of Gnomish race, but forsook the march from Kuivienen, and came never to Valinor."

It shows up again in a late (1968) essay:

"The Eldar of Ossiriand, the Green Elves, though wood-dwellers, were of quite different origin, which does not here concern us; they were probably in origin of Noldorin kinship."
NoMe, Silvan Elves and Silvan Elvish