[Lalaith]

Thinlomien, this is quite an interesting site that might help answer some of your questions. Here's a pertinent excerpt, but there's lots of other stuff there:

Fingolfin's wife, Anairë, was of the Noldor and she stayed in Aman when the Noldor left, apparently because of her friendship with Ëarwen, the wife of Finarfin.

Orodreth was apparently intended (in the final form) to be Finrod's nephew, rather than his brother. Another surprising alteration is the denial to Fingon of wife or children, and the assignment of Gil-galad (Rodnor Gil-galad) to Orodreth as a son. The consequences of these alterations, although significant, would have resulted in minimal changes to the published Silmarillion: (1) the reference to Ereinion being sent to the Havens after Fingolfin's death would have been removed, and (2) Orodreth could not have held Minas Tirith for Finrod after Nargothrond was established. Possibly, Angrod would have been removed from Dorthonion and given command of Minas Tirith (where he would, perhaps, have died) and Aegnor alone would have held Dorthonion.

Fingon actually had been given an unnamed wife and two children in the aforementioned four tables, but Christopher writes: "...in the final table they were struck out, with the note that Fingon 'had no child or wife'."

The ubiquitous Gildor Inglorion, sadly, is nowhere mentioned in the section dealing with Finwë's descendants. I'm not sure of whether Tolkien decided the House of Finrod was to be something else, or if perhaps Gildor came over to Middle-earth in the Second Age with Glorfindel. This last inference, although improbable, derives from the fact that Tolkien writes that Finrod did not have any children in Middle-earth:
Finrod left his wife in Valinor and had no children in exile.