Hi there, welcome to the forums, before I answer or try to answer your question, can I ask that you take a look at the
rules. One liner posts are not allowed on the forums. There is a reason for it that is explained there, so please elaborate in future.
It does say somewhere on JKR's website about naming Harry Potter....there is also an article on her site in which she says, that she collects and remembers names, from places like War memorials, telephone directories, shop fronts, saints, villains, baby naming books and she obviously makes a lot up.
I hope this helps, matbe someone else has a more concise answer.