I can confirm you can never change the name on the account. This is because you cannot trade, sell, or GIFT an account to anyone. EULA states so.

The ONLY way they will change a name is if the name is under a mother/father, and the child turns 18 and can legally have his own account (or whatever that age is). But then I'd think they'd be suspicious if the last names didn't match, if they did you could just xfer the character anyway.

So yeah, I wouldn't try even asking them to change the name....just will raise red flags.