How close is the published The Silmarillion to JRRT's Silmarillion?

[Galin]

Whaddayamean if?

Okay if.

So not that anyone is really questioning me so far, but might as well post the reference from The Shibboleth of Feanor [the first of two]:

'... Galadriel's hair. Galad occurs also in the epesse of Ereinion ('scion of kings') by which he was chiefly remembered in legend, Gil-galad 'star of radiance': he was the last king of the Eldar in Middle-earth, and the last male descendant of Finwe* except Elrond the Half-elven.'

Author's note, note 47: 'He was the son of Arothir, nephew of Finrod.' [see the note on the parentage of Gil-galad, pp. 349 ff. -- From this work was derived Gil-galad's name Ereinion introduced into The Silmarillion.]'

The Peoples Of Middle-Earth

I take Christopher Tolkien to mean ['from this work'] The Shibboleth of Feanor here, itself dated 1968 or later, and the note making Gil-galad the son of Arothir is dated earlier than the Shibboleth, at 1965. Ereinion in Aldarion And Erendis was an editorial change by Christopher Tolkien, and does not occur in the original, which actually had 'Finellach Gil-galad of the House of Finarfin' rather. Other instances in Unfinished Tales seem to be Christopher Tolkien employing the name while describing something.

So far I can't find any other earlier instance of Ereinion, so that's why I say this name occurs only after Gil-galad became, once again, a Finarfinian.

Again just to post it, and to help explain my reference to Finwe earlier.