Does Aamir necessarily have to come first? Can it be नेहा का पड़ोसी आमीर है?
That would say, "Neha's neighbor is Aamir." Is there a difference? You decide.
Why is का पड़ोसी used? Isn't पड़ोसी feminine?
पड़ोसी is masculine. Although it ends with an "i". That is why "ka" is used.