Quenya Grammar P2: Historical Development

Like all Elvish languages, the primitive precursors of Quenya appeared soon after the awakening of the Elves in Cuivienén, a period when all Elves spoke the same language. Tolkien referred to this period as Primitive Quendian or Common Quenderin [CQ]; most of the literature on Elvish uses CQ to avoid confusion with the Parmaquesta [PQ] period discussed below.

Craban

Forums

As the crebain were birds of Middle-Earth, I assume their name would've been adopted into Quenya as a loanword - but how would it have been adapted? *ravan? *karwan?

I see in Eldamo that the word has been extended with the meaning "raven", which makes sense in a way.

Quenya Phonetics P43: exhilic [ts] became [ss]

Q. exhilic [ts] became [ss]; [ts] > [ss]

In the Outline of Phonology [OP2] from the 1950s, Tolkien mentioned a late Exhilic Ñoldorin sound change of ts > ss:

but in Exhilic N. ts > ss (OP2: PE19/85).

This sound change was an addition in red ink (PE19/85 note #76), but it was also mentioned in the notes on the Feanorian Alphabet from the 1940s among “post classical” sound changes: