Here is one of the post I remmeber reading -

from DarkslayrX

"Had to kill my 5th acctThought I would share - I finally got a hold of Blizzard last night: Despite having all the account information be mine, except for the first name on the acct (I am talking last name, email address, credit card info, etc. all in my name), Blizzard would not make the change (telling us that account names - first and last - are set in stone). As I don't want to get all 5 accts banned, I cancelled the acct and will setup a new one tonight (I had already picked up a new copy of wow predicting that this will be the result as I know Blizzard takes the account name pretty seriously regardless of whether or not you are husband and wife).

For those that play on your wife's acct (even if everything matches except the first name), I would recommend that you bite the bullet now and cancel the acct and roll a new copy before you run into any problems. I know it sucks, even if it is really your acct, but in my opinion - not worth the risk.

Edit - and the worst part for me, this has really messed up the plan for my group as I am not sure I can roll the same toon again (a druid) and level them up. May have to rethink the group makeup."