Lassiriand
Lassirand is one of the rejected names of Beleriand which J.R.R. Tolkien jotted down "on a page of rough working for the opening of the Lay" (of Leithian) when he was probably searching for a replacement of Broseliand, used so far.[1]
The name is connected with Quenya lassë 'leaf'.[2]
All in all there were eight of these names: Golodhinand, Noldórinan, Geleriand, Bladorinand, Belaurien, Arsiriand, Lassiriand, Ossiriand.[1]