A noun appearing as G. nâla “yellow-lily” in the Gnomish Lexicon of the 1910s, derived from primitive ᴱ✶nalda (GL/59).
Neo-Sindarin: Since there are no later “lily” words in Sindarin, I would retain ᴺS. nala “(yellow) lily” for purposes of Neo-Sindarin, perhaps with an updated etymology based on ✱nalga.
An earlier name of Celebrant in Lord of the Rings drafts from the 1940s (TI/241), apparently celeb “silver” or celebren “of silver”, combined with rath “course, river-bed”.