My favorite LOTR trivia, which even works for those who’ve only seen the movies:
Q: What’s the relationship between the 2 eldest and wisest elves in Middle Earth, Galadriel and Elrond?
A: Mother-in-law.
Tuor = Idril Celebrindal
Cirdan is older than either of them, and is usually described as wiser. And unless there’s some connection I’m missing, he’s not related to either of them, not even in the sense that the First-Born of each tribe are related to each other.
MrDibble, it’s never explicitly stated that Goldberry is a fey (Tolkien stopped using the term before Goldberry appeared in any of the works), but the nature of fey is described in some of the earlier works, and it’s consistent with Goldberry being “the river’s daughter”, where none of the other known categories of beings are. Likewise for, say, Ungoliant.
I think it’s pretty useless to try and categorize Bombadil and Goldberry. They come from outside the general world that Tolkien was crafting (“The Adventures of Tom Bombadil”, 1934 IIRC, in its original version doesn’t make reference to much of anything specifically Middle-Earthy). He added them into The Lord of the Rings at the time that he was still writing a “Hobbit” sequel, and it wasn’t entirely clear to him that The Hobbit had to follow the “rules” of his Silmarillion stories’ world. In The Hobbit, Tolkien references giants throwing rocks around in the Misty Mountains; he doesn’t make any other references to giants in any of his stories that I recall, so where the heck did they come from?? Best to just leave such unexplained creatures as unexplained! 
I can’t remember ‘Goldberry’ ?
As for the Hobbit - the way I see it is really Bilbo’s version of events, from his memory, 60 years after the fact as being told to a group of kids at his Hundred and Eleventieth birthday. Some of the things in it (Stone throwing giants) are meant to be just a bit of story for the kids.
Goldberry was Tom Bombadil’s wife. If you’ve only seen the movies, you wouldn’t know of either of them.
And the conceit is that it was actually a book that Bilbo wrote, not just stories told directly to children, but there’s still a sense that he might not have been an entirely reliable narrator. That said, I don’t think that we can necessarily rule out the possibility of giants, who just keep mostly to themselves and thus don’t come into play in the other stories. Note that we’re given very little detail about them in the book, and there’s certainly no implication that they’re themselves mountain-sized like in the Hobbit movie: They could be just something akin to the trolls, though not as evil (Gandalf makes mention of having dealings with some of them, who are more or less decent).
I have read the books - just my memory is not always what it should be.
I read the Hobbit book as his narrative - maybe its not even the complete ‘book’ that he wrote, but just the good parts edition.
I look at antique gowns on FB sites and whenever I see a green-and-gold, or green-and-silver masterpiece from the past, I think of the description of Goldberry. Long golden hair, a reed-green gown shot with silver thread like drops of dew, and a gold belt. (I love green and silver, and green and gold!)
I would tentatively classify the giants as being among the fey creatures–personifications of the mountain song, as Goldberry is a personification of the river’s, with their boulder-throwing games corresponding to avalanches. That would make them very different from trolls (about which I have my own theories).
Except she’s the River-woman’s Daughter, not “the river’s daughter”. To me it’s more consistent with being a follower of Ulmo who, as we know, essentially has dominion over all waters, both seas and rivers.
She’s also called “river daughter” by Tom.
Trying to fit Tom Bombadil and Goldberry into Tolkien’s legendarium is like nailing Jell-o to the wall. Tolkien himself said they don’t fit; anything you hypothesize is neither right, nor wrong.
River daughter and river’s daughter are not the same thing.
True - all the things I’ve said that aren’t direct quotes should have a giant “IMHO” flag attached.
There’s a song in my head…
Specifically, he’s wise enough to mostly be a footnote in stories that rarely end well for ancient and powerful elves.
Bombadil himself definitely can’t be pinned down, but I don’t think that Goldberry is hopeless. In any event, she’s certainly not the same sort of thing as Tom, because nothing is the same sort of thing as Tom.
And Ungoliant pretty clearly does fit into the legendarium and pretty clearly is fey (an embodiment of Darkness), which suffices to demonstrate that fey exist in the final form of the stories.
I have always thought what Tom & Goldberry’s children would be like.
There is no way, based just on the stories, so far as I am aware, to determine that Ungoliant is not a Maia. It’s not that I’m disagreeing, it’s just that it’s not possible to say, with certainty, that the Professor was including fay creatures.
Glorfindel (who may or may not be older than Galadriel, saved Frodo from the Ring Wraiths (not Arwen, bleh), and killed a Balrog on his own ages before the LOTR)