Fail still can only make x3 toons account wide.

Apologies for the frustration here, this is being worked on as I post this.

We know you’re all eager to get on and claim your names on the new realms and we hope to have the limit removed as soon as possible. Thanks for your patience!

As some have posted already, the character limit should be lifted now so you should be able to claim more than 3 names.