Noldorin name of ᴹQ. Ulmo from The Etymologies from the 1930s (Ety/WAY), also appearing as Guiar (Ety/ULU), derived from the primitive form ᴹ✶Wāyārō.
Conceptual Development: In the Gnomish Lexicon from the 1910s, his name was given as G. Gulma (GL/18, 43), but appears as Ulm or Ulum in “Official Name List” for the Lost Tales (PE13/101). In the Lays of Beleriand from the 1920s, his name was first given as Gulma but was revised to ᴱN. Ylmir (LB/93), a form that reappeared in the earliest Silmarillion drafts (SM/13).
A Noldorin name for Ulmo appearing only in The Etymologies from the 1930s (Ety/NU), apparently a masculinized form of nûr “deep” and with the suffix -on.