Argh, double barreled surnames. I have been cursed with a double barreled surname. Not only is my name too long to write on most forms, but trying to ask for something filed under my name is always a faff.
Person: "Did you say your name was "xxx"? I've got nothing on file here."
Me: "No, I said my name is "yyy-xxx"."
Person: "I don't need your middle name."
Me: *facepalm*
I am doubly cursed because the first half of my surname sounds a bit like the word "surname". Over a crackly phone line, it is incredibly tiresome to sort out any confusion the person on the other end has.
And I have to go through this every time I go to the doctor, phone up a company, fill out a form, etc etc.
In conclusion: DON'T DO IT! Not only do you curse yourselves to a lifetime of beurocratic agony, you curse any potential children too!