Wow, Aidan spelt properly. And quite a traditional batch of names for the US, too. Amir Rami is fun, in a palindromic way. Is Nia a full name in Croatian, or is it short for something?
Nia isn't a traditional Croatian name, so I assume the parents hear it somewhere else and liked it. We do have names like Ria, Tia, Mia, so this one fits into that group. I guess it could be a nickname for Antonia, but I've never seen it used as such before.