Registering multiple accounts - must use same name?

[Khatovar]

When I'm registering my multiboxing accounts for Cataclysm should I use my name and also - can you register multiple accounts under a single battlenet account?

Yes and yes. IF you are reported, Blizz will check the names on the accounts. If they don't match, then you are, as far as they are concerned, using accounts that are not yours, which is a violation of their rules and bannable.

You can have up to 8 {??} accounts registered under the same battlenet account.