It depends on the state you live in. In my home state of Indiana, you can have a legal name and an alias. By using the alias to sign documents and by "owning" the name (aka using it to identify yourself) it becomes a legal name in the same manner that "possession is 90% of the law". If you use it, it becomes a legal name for you, much like a pen name.
The names of the girls are Milly and Becky Rosso. Their full names are Rebecca and Camilla Rosso. They act in The Suite Life of Zack and Cody as Janice and Jessica.
Annie and Izzy
Yes.
yes
Yes.
Yes.
Yes.
No. No such database exists.
Yes.
Yes.
Milly and Becky Rosso.
Yes