A name for the “Sun when she issues from her white gates” in the Qenya Lexicon from the 1910s (QL/71), apparently an elaboration of osto “gate”. This name was first given as (rejected) Ostar.
Early Quenya
osto
noun. gates of the Sun
ostor
proper name. the East, the Sun when she issues from her white gates
A word for “the gates of the Sun” in the Qenya Lexicon of the 1910s derived from the root ᴱ√OŘO [OÐO], also the basis for ᴱQ. ōre “dawn”; Tolkien considered transferring it to the root ᴱ√OSO, the basis for wall and town words (QL/70-71).