Nostalrius Begins - Quality wow vanilla realm (1.12)

Hi! I've got an awesome mage and and awesome war on nostalrius! Both geared and I'd like to play on them again!

But I cant remember my Account login I can provide the email used and I have the password too, but I simply cant remember the Account login name (

I remember the names of my toons, and my old guild will be able to confirm that I am the owner of the account, but I simply cant remember the name ><

Can you please help me ??