Er, real-life hyphenate here.
I'm not posh. (Didn't even know that stereotype existed! Maybe it's a UK thing?)
I love being a hyphenate.
And yes, my parents hyphenated already-very-lengthy surnames. My name is so long that it never fit on forms as a kid. My name is so long my mom made up a song to teach us to spell it (which I hummed in my head while writing my name till I was at least in my teens). Nobody can ever pronounce my name, and it's properly intimidating (even in classes where people are called by last name or whatever, I always get tagged with my first name). Lots of places can't fit my name in or don't do hyphenation, so every single form of ID I have says something slightly different -- sometimes it's mushed together, sometimes I only get half of it, sometimes they make it into a middle/last name instead of a hyphenated surname. One time I had to go back to the DMV armed with six forms of ID so they would let me get my driver's license ("Seriously? Do you REALLY think someone else has this name? I AM THE ONLY PERSON WITH THIS NAME ON THE PLANET!") I still love it.
I've also never been told that my name sounds in any way posh or arrogant or cliche or....anything, really, other than hard-to-spell.
It's just me.
Although my name
is ethnic, and neither half is English, so that might have something to do with it. Now that I'm an adult, people sometimes assume I'm married because of the hyphenation and that my spouse is one of the halves, but it's rare people even think that far about it.
There are plenty of reasons people hyphenate. Names can be so important, and so linked to identity. In my family, I think my parents wanted us to have a name connection to both of them. I suspect ethnicity also played a role -- my parents are clearly different ethnicities and I think it probably would have felt weird for my mother if she had adopted my father's name wholly as hers.
Never heard the term "double-barreled" before, but I love it and am cheerfully going to steal it.
Anyway, I've never felt it was weird being a hyphenate. It's normal for me. There are plenty of us around. And a big fat BOO on the stereotyping -- I truly love my name and it makes me all sadface to think of people hating on it for the hyphen!