A surname of Lórien as lord of dreams in Silmarillion drafts from the 1930s (LR/205). In The Etymologies it was given as a compound of olor “drem” and Fantur “Lord of Cloud”, the latter of which also appeared in the surname of his brother, Nurufantur (Ety/ÓLOS, SPAN).
Conceptual Development: The name ᴱQ. Olofantur “Fantur of Dreams” first appeared in the earliest Lost Tales, already with essentially the same meaning as above (LT1/66; QL/37, 69). This name disappeared from Silmarillion revisions from the 1950s-60s, but the term Q. Fëanturi was still used to collectively describe Mandos and Lórien.