I do not know if this has been discussed before, but having read "Notes on
Óre", I encountered the name Ekyanáro, said to be variant form of the
Aikanáro. While the first element of the former is very likely to be
derived from the root EK "stab, prick with a sharp point", the latter is
from GAYA "dread, awe". We also have the stem AYAK in The Etymologies
meaning "sharp" Could it be, in Tolkien's later conceptions, that the
gloss "sharp" in _aika_ be perhaps influenced by _ekya_? We cannot
really discount the Sindarin derivatives of AJAK (obsolete though the
stem may be IMHO) because of the attested form _aeglir_ (as in Hithaeglir).
Some discussion on this matter is very much appreciated, confusing though
this post may be.