So, remaining vaguely on topic:
Where’s the evidence, if any, that a person with an uncommon name is less likely to be happy?
I know a kid with the middle name Obiwan* and I don’t think I’ve ever seen him smile. Of course, he’s five and possibly autistic, but it’s a data point for you.
*Not this but a different name from the Star Wars universe that’s just as ridiculous.
Here’s an article on the subject(just the 1st thing Google gave me.) Here are a couple of interesting bits (bolding is mine):
This old thread of mine might be of interest: I just met Thorin Oakenshield, believe it or not - Cafe Society - Straight Dope Message Board
Soren makes me think of that androgynous alien of the same name that Riker sexed up on ST: TNG. It wasn’t even a very good episode.
There’s alsothis current thread where the very first sentence in the OP clarifies that he’s not asking how someone could sanely continue to live with a unique name.
Right you are, on all counts: The Outcast (episode) | Memory Alpha | Fandom
But “Madonna Badger” is not just an unusual name; it’s a hilarious name. Just because someone likes unusual names does not mean they’re in favor of every kind of unusual name possible.
As far as the stats about 8-20% of British parents regretting unusual names/spellings, I wonder how many parents regret their child’s common name? I’m sure it’s not zero. Of course some people are going to have second thoughts.
If you’re going to name the kid after an actual person, then give them that actual persons name.
“Søren” is a perfectly normal name. “Soren” isn’t a name at al. And Søren is not pronounced to rhyme with “Sore end”, not even close. If you can’t pronounce it correctly, please just leave it well enough alone.
“Soren” has been moving up on the charts since 2003; if that trend continues, will it ever become a name? Or has the time passed for new names to be coined, and anything not going back to at least 1900 or whenever (with the exact spelling and pronunciation) is forever a fake, non-name?
One of the Cracked.com writers is an American named Soren.
Paul Tristram is okay; I don’t much like “Tristram,” whcih sounds pretentious, but since it’s a middle name it doesn’t really matter.
“Soren Sebastian” is, I’m afraid, just a horrible name, at least IMO. It’s a really poor choice of alliteration; two straight S’s just sounds terrible. It’s hissy and unattractive.
That’s without even questioning whether “Soren” is a good name; in my opinion it’s not. It sounds like a Star Trek villain. (ETA: In fact, it WAS a Star Trek villain, I am delighted to report.) But even a better name like Stephen or Scott, if it started with an S, would present a really ugly alliteration.
I don’t like Tristram or Sebastian but buried as middle names, they’ll be fine. I actually prefer Soren to Paul (sorry, Guano Lad), so bummer that it’s off the table. How do you feel about Douglas? Looks like I won’t have a chance to use it, and it was my Grandfather’s name 
Actually, I agree. But I felt obliged.
Frylock, just wondering: The fact that you would go for Tristram makes me suspect you have some interesting taste in literature, so did you by any chance think of Soren because of Søren Kierkegaard?
If so, major kudos. Heck, if you don’t want those names. I’ll take them. That is, I’ll go impregnate some poor woman with a boy child, then take them.
It’s killing me because I’m sure there’s a bandname that’s sounds similar to Soren Sebastian.
Personally I don’t have a problem with Tristram or Sebastian - they are rather ‘poshboy’ names in the UK but I presume they don’t have the same connotations in the US. Tristram perhaps sounds like the class wimp, but Sebastian (‘Zeb’ to his friends) would definitely be captain of the rugby team so that’s ok.
Paul sounds a little middle aged and I’m not a great fan of foreign names like Soren when you don’t have a family connection to the country in question, but who cares really, they’re your kids.
I do think it’s nice to have a name that can be abbreviated though - it allows the name to be adapted to the personality or preference of the kid in question.
You should throw “Bob” and “Frank” on your list, and go in the order Allen/Bob/Carl/Donald/Edward/Frank/George. Then every logic puzzle ever made can be about your family!
I intend to name my children traditional names, too, but only the rarer ones. So, like, Arthur or Rose. Stuff like that.
A word to the wise: Don’t ever name your kid with the intention of using his middle name as his given name. It creates nothing but headaches later in life when business folk keep using the ‘wrong’ name and his friends eventually find out that they haven’t been using his ‘real’ name.
Our current favorites are Henry and Julian, with middle names TBD.
I agreed to Julian only on the stipulation that Henry shall be the one to receive my patriarchal blessing. Julian will just have to scheme for it.
I think these might not stick once my wife realizes there’s no short name for Henry (she really likes names to have short forms fsr) and the clearest short form for Julian is Jules… (she likes Jude though).
But anyway, that’s where we’re at right now.
Soren is an awesome name and you are just haters is all I’ma say. 
I know one - little shit - but has done fine with the name.
Never fret about a middle name, it doesn’t generally get used. Its THE place to pull out that heavily ethinic name of your great grandfather, or horribly misspell Mary - if you must.
My nephew, who’s now in college, is named Henry and he hasn’t had any problems with the name that I’ve ever heard. It’s also long been a popular middle name on my father’s side of the family.
RickJay, the Star Trek villain was Soran, not Soren: Tolian Soran | Memory Alpha | Fandom
The name Julian has a ST connection, too, of course: Julian Bashir | Memory Alpha | Fandom
Belle & Sebastian?
If I had had a boy and a girl, I *might *actually consider naming them Belle and Sebastian… except that they’d kill me for it. Hang on, they would be great as cat names, though. In fact, I have to do that right now!
Runs out to get one boy and one girl cat.