An adjective for “stone” in the Gnomish Lexicon of the 1910s appearing as an element in G. gôf·clochiol “stone-fruit” (GL/40), derived from G. cloch “a stone” (GL/26).
Gnomish
gondolin
place name. Stone of Song
gondolindriol
proper name. Gondolindriol
clochiol
adjective. stone
gond
noun. stone
Apparently a name of Earendel as a descendant of Indor in an early name list (PE13/103), perhaps some elaboration on Earendel’s birthplace, Gondolin.