A noun for “nightingale” in The Etymologies of the 1930s, adapted from Ilkorin myrilind “since mori did not = ‘night’ in N” (Ety/TIN). S. dúlin “nightingale” is better attested.
Noldorin
tinúviel
feminine name. Nightingale, (lit.) Daughter of Twilight
Tinnúviel
noun. nightingale
duilin
noun. nightingale
dúlin
noun. nightingale
dúlin(n)
noun. nightingale
dúlind
noun. nightingale
dúlinn
noun. nightingale
merilin
noun. nightingale
merilin(n)
noun. nightingale
mœrilind
noun. nightingale
nightingale