WARNING Nerds naming a baby...

But Bram is cool.

You can't use Bran as the name of a child.
Every single Irish language textbook in every single year of primary school had a dog called Bran. It's the Irish equivalent of Spot.

Bran was Finn McCool's dog.

I mean, there has been worse inspiration for a name than a legend's dog. Why not? Woof Woof, reminds me of all bran though.

Love Bran and Bron, (Good historical names I have used in the past about 10 years pre GoT (horse breeder)).
Paloma is also quite funky.

Ronald is good too, but I could never use it due to having probably the world's dodgiest relative with that name.

Boys ~
Remus -- nice
Thomas -- nice
Castiel -- not nice as it is associated with a show.
Bronn -- prefer Bram. I would avoid pop culture in general as a source of names.
Wulfric -- ok, a bit attention seeking, big name to live up to as Wulf has almost exactly the pronunciation of Wolf. What if your boy isn't the dashing sort?
Ronald -- nice
Merlin -- trying too hard, and again, not a name I would like to have to live up to.
Stanley -- nice, so is Stanislas
Rogue -- name of a terrier.
Percy -- nn for penis
Azazel -- NO (meanings)

Girls~
Circe -- no (negative mythological association)
Paloma -- no (slang)
Sansa -- sounds like American 'sansabelt' old men's trousers and there is a coffee brand 'Sanka'
Minerva -- nice but NN would be Minnie, which is slang for vulva
Khaleesi -- I think the GoT and other pop culture references are silly.

Suggestions:
Dashiell
Juno

All of them, Soontobe? Even Thomas? Thomas is about as inoffensive as a name gets. And Minerva and Paloma are unusual but normal.

I'm a total nerd and even I say a massive, resounding NO to all of the names on the list. In my opinion naming your child any of those would be really naff - sorry.

Merlin is bloody ace, if you have the balls to go for it!

Poor children!!

I was a bit about the opposition to Khaleesi, which without googling, I took to be a middle-eastern or Asian name, probably male.

Anyway, it would appear that there were 50 baby Khaleesis in the UK last year .

Sorry I know its not helpful but the only boys one I like is Stanley & none of the girls.. Maybe Paloma at a push. I'm not against unusual names but I don't think those on your list sound nice.

Congratulations Sleepy'

My suggestions are

Girls
Paloma
Pearle

Boys
Stanley
Sidney

You know that your babies will be their own people right? And not just extensions of your interest in fantasy books and/or TV?

Surely - as a nerd, you know the worst of all world's is to go for geeky and get it wrong (if you have geeky friends they will be wtf at you using khalessi wrong!), or a character who you previously really liked but became a knob over time.

I'd go for something that references lots of the characters, actors, writers, directors of the series you like: Dean, Cassandra - names like that. You can always pick a more unusual option as a middle name.

Added bonus less likelihood your child will change their name asap.

No No No to Ronald simply because of Ronald McDonald!

Merlin is good, Stanley as well

Brutally honest here. None

I'm one of the few who doesn't have a problem with made-up names from fiction etc., as some of them have become really mainstream in the past, e.g. Fiona, Lorna, Selma. Someone back then had to be the first brave soul to name their child after that character!

But having said that, these older ones at least sounded like real names, whereas Khaleesi and Rogue really don't. As I've never read or watched any of the sources for the names you mention, my opinions are based solely on face value.

Boys ~
Remus - a bit quirky, but OK
Thomas - I find this name terribly dull
Castiel - I like this, even though it makes me think of soap!
Bronn - OK, but it seems more girly to me.
Wulfric - too mediaeval for my taste, but OK
Ronald - also very dull
Merlin - I like this
Stanley - too "old man" for me
Rogue - it's not a name, it's a word
Percy - not keen, tbh
Azazel - I wouldn't be sure how to pronounce this but it seems awfully close to vajazzle....

Girls~
Circe - Kirky, as in Coronation St??
Paloma - yes
Sansa - yes
Minerva - yes
Khaleesi - sounds rather "Jordanesque", I'm afraid, like the kind of thing Katie Price would go for.

I do hope you have two girls - you have three lovely names there to choose from.

Re post above - Surely the name of a treacherous, murderous, man-eating wolf (Fenris/Fenrir), an ancient symbol of destruction, is not an ideal child's name, either...?

Khaleesi is getting very popular - she might not be the only one in her class! Daenerys is pretty as an alternative? How about Arya? That's a lovely name and doesn't sound too out there.

If you're a Buffy fan;
Willow, Tara, Alexander, Rupert (Giles), Cordelia, Faith, Riley, Dawn?

Supernatural;
Dean, Sam?

Love Arwen as mentioned upthread and that's also a 'wearable' name

My nerdy opinions, based not just on the names and their origins, but on how well they will wear, and if they can be shortened to something nice:

Remus - yes
Thomas - yes
Castiel - yes (he'll be called "Cas" at school, which is nice)
Bronn - hmmm, dunno, probably not
Wulfric - yes! Love this.
Ronald - yes, with hesitations
Merlin - what about Emrys as an alternative? (Merlin's other name)
Stanley - probably not
Rogue - probably not
Percy - no, as also name for willy. ("Pointing Percy at the porcelain.")
Azazel - no, nobody will ever spell it right, he will never get a plane ticket he doesn't have to change, etc.

Girls~
Circe - hmm, dunno
Paloma - yes
Sansa - yes
Minerva - hells yes, love this
Khaleesi - no, as title, and will date

Do remember you have the option of middle names, so can go wild there, too!

I regret being too pregnancy-befuddled to remember to give mine the middle name of "Strange".

Hmm well I like some of your names but some I would say are unusable.. especially Khaleesi!

I like Thomas, Castiel, Bronn and Stanley for boys and Paloma and Minerva for girls.

Paloma and Bram!

Other geek names
Thisbe (from Pyrsamus and Thisbe which is similar to Romeo and Juliet)
Suneva (sun goddess)
Meritxell (prn Merishell)
Andromeda (Annie for short)
Nimue (prn Nimoooeee)
Morgana
Gwendillion (I made up that one! Its a hybrid between shamillion and gwendolyn )
Tamar
Orson
Taliesin

I would be careful with using a GoT names, as the series is unfinished you can't be to sure how the characters will turn out in the end.

Agree with ppl above, pick a name that already exists so it won't sound so dated. Having said that I quite like Bron (as a nickname though)

While I think Sansa's a nice name (and so are Bran(don) and Arya)......

I wouldn't name ANY child after a character in Game of Thrones! The story hasn't finished yet (and will it ever finish, we are all wondering), and considering the rate at which George R.R. Martin bumps his major characters off, your children could forever be associated with someone who got melted by a dragon/ eviscerated by a frozen zombie/ raped and tortured by outlaws/ smothered by the evil queen's henchmen- and on and on and on at quite some length.....

utterly naff and immature, as if you identify so strongly with a set of made up characters that you don't have opinions and personalities of your own! I imagine teen dungeons and dragons players grumpily lurching their way to school while in their head, they're fighting trolls on the Hills of Munplunkio or something else utterly cringeworthy

Bit uncalled-for. I broadly agree that I wouldn't personally go for some of the more obviously fantastical names, but there's no need to be sneery about a person's taste in entertainment.

Anyway, the most traditional and "acceptable" names in the English language are often from the Bible, and what is that if not a fantasy novel full of "made-up characters"? It's just been around for longer and permeated our culture so that nobody blanches at a Thomas or Joshua or Zachary. Wendy was a made-up name, as was Pamela.

I think there are "good names ", that work well with our language, and these can be old faithfuls (Elizabeth, Sarah, John etc.) or they can be newer creations. I'd be happy to be called Sansa, Arya or Lyra, for example (in fact I would prefer them to my own very traditional, very MN-approved name!), but would be embarrassed to have to introduce myself as Khaleesi.

From your list I would veto Rogue, Khaleesi, Azazel, Circe and Wulfric right off the bat. I dislike Ronald and Stanley.

As a GoT fan, one of the nice things about it is that many of the character names are already very usable (Jon, Ned, Robert, Bran, Catelyn etc.)
There is also Dacey, Jorah, Lann (ancestor of the Lannisters), Brienne, Selwyn, Asha, Lyanna - all perfectly wearable names to go through life with.