What do you think about them in general?
Which do you prefer a hyphenated last name, or a second middle name for the other surname? Another option is just one middle that is the other surname?
Would you keep your surname and ditch your middle name if you took another surname?
I don’t like them personally. I think they usually end up sounding awkward, unless both surnames are very short (Baker-Smith) and then it can be complicated because I’m unsure if all documents/websites allow hyphens?
That said, I understand why some people might like them and want to use them.
Personally if I was attached to my last name and wanted to keep it somehow I’d make it my middle name while also keeping my pre-existing middle name.
But that’s all hypothetical, I don’t have a middle name and also hate my surname lol.
I like them if the names sound somewhat good together.
August Smith-Mills, I don’t like, but August Miller-Smith sounds okay to me!
A hyphenated name! Though my personal favourites are Spanish surnames, which have both surnames but no hyphen and the parents keep their names (though I’m aware that’s only possible in certain countries).
That’s not possible where I am, but even if it were possible, my surname is rather interesting so I would keep it.
However, if I were named Smith or Miller, I would just drop it completely.
I think they’re fine. In fact I love it as a way to incorporate both parent’s into the surname. I do appreciate that that can be difficult in quite a few cases though. I have one and if I have kids with a partner they’ll probably have one too. For my own name it means I get another family name, and I like that.
I think it depends on the reason for hyphenating. If it’s two parent’s surnames, hyphenating feels more equal. Especially as middles aren’t used nearly as much as surnames most of the time. That being said, I am actually considering making the first part of my surname a second middle. I pretty much used it that way until I turned 18. It just simplifies things, especially if I get married and want to hyphenate again. But in my case it’s a family name my dad just wanted somewhere in there, not two parental names, so it’s different.
So family or honour name = middle and parental surname = hyphenated.
I don’t have a problem with it, most of my characters (most of my characters are LGBTQ and married) have hyphenated names. like Lopez-Pierce and Anderson-Smythe. it’s kinda cute in my opinion
I don’t like them. [name_f]My[/name_f] son has my surname, I refused to hyphenate it. It is a word name so sounds ridiculous if hyphenated imo. I won’t ever get married as it just doesn’t appeal to me, but if I did get married, I would keep my surname (because it’s a nice word name it would work nice as a middle but I’d not do that).
[name_f]My[/name_f] husband is from Mexico, and everyone there has a last name from the father’s family and a last name from the mother’s family. The women don’t usually change their last names when they get married. If they do, they add the husband’s name on to the end.
Here in the US, my husband’s second last name is constantly dropped for unofficial things. I chose to only give our kids his first last name, which may cause problems if we move to Mexico. I wanted to get rid of my maiden name ASAP, so when we got married I changed my last name to the same one the girls have. I was tired of being the millionth [name_f]Jennifer[/name_f] [name_m]Brown[/name_m]. I kept my middle name, [name_u]Lynn[/name_u].
In general I like them! It really depends on the names in question though, if the combo gets to long it often starts sounding clunky and almost like parody.
I agree with that. Hyphenating is nice but simply having two surnames would be nicer.
I plan on ditching my surname completely when getting married. Like Polly said, turning it into an additional middle name isn’t really a thing here, the specific names don’t sound good together hyphenated and I’m not terribly attached to the name anyway.
Hyphenated surnames are pretty common here, although in my personal experience people who have them normally come from one of two situations: either their parents were unmarried when they were born, or their father already had a hyphenated surname and passed it on to them. Two people combining their surnames when they get married is getting more common though, I think (again this is just my experience).
I like hyphenated surnames, although I have always wondered what happens when a hyphenated surname person marries another hyphenated surname person, and neither want to drop their name… quadruple barrel anyone? 
I don’t mind them. They can sound pretty cool
I think I prefer hyphenated surnames to having an extra middle or a surname in the middle, purely because I’d rather have a “name name” in the middle
I’d keep my middle if I took another surname. I’m not particularly attached to my surname
It depends on the combination and the circumstance. Sometimes I really like them, sometimes not so much. I’d honestly rarely (if ever— I can only think of a few pretty unlikely circumstances) discourage someone from doing it, but likely wouldn’t go that route myself.
My most preferred option is one middle that is the other surname, followed by hyphenated— I’m personally just not a two middle names guy!
No, but I don’t love my surname and am not very attached to it. When I marry, I plan to take my spouse’s surname (unless they don’t want theirs either, then we can pick a new one together), though I will likely continue to use my “maiden name” professionally at least for a while if not permanently.
I really find hyphenated names annoying 
So I definitely wouldn’t do that to myself or my child.
I also have a strong preference for 1 middle name and my surname doesn’t sound great next to my husband’s so I wouldn’t give my child my surname for a middle.
If I took my husbands last name I would drop my middle and replace it with my surname. [name_m]Even[/name_m] though they don’t sound very nice together. Its very common where I live to do this. Probably more common than keeping your middle name.
I like them! Personally, I would prefer to double-barrel with no hyphen, but that can be confusing. If I ever marry I’ll probably hyphenate or double-barrel. I wouldn’t leave my middle name, and I wouldn’t want my partner to, either.
I wouldn’t give my surname as a middle name to a baby, but some work better than others. Surnames are a very personal thing to a lot of people and I don’t judge what people do with their surnames… unless they come up with a totally new one. That bugs me, for some reason-- if your surname is [name_u]French[/name_u] and your partner’s is Nigerian, why would you choose, say, an [name_f]English[/name_f] word?
I personally think that equality trumps having a catchy name. I love my name, I had no intention of changing it, and my husband felt the same way. Why relegate one of those names to a middle spot or lose it? Plus let’s face it, it’s almost always the woman’s name that is lost.
So I would rather set an example of parity to my kids than give them the best sounding surname, but that’s totally personal - no judgment on other people’s decision process, but I’m always stunned at how much judgment people feel free to give my double-barrelled children so I’m not sure that’s a two-way street….