Wow - the freedom we have, without even realizing it.
We can name our children whatever we want. Others cannot:
http://worldnews.nbcnews.com/_news/2013/01/03/16320630-teen-legally-known-only-as-girl-battles-to-use-her-own-name?lite (http://worldnews.nbcnews.com/_news/2013/01/03/16320630-teen-legally-known-only-as-girl-battles-to-use-her-own-name?lite)
Most of my kids came with their own names. They had the option to change their name when we finalized the adoptions. I would have trouble with having to check a registered list first. :D