How many ways can you spell Stephanie?

It is impossible to say how many people have a certain name. Not all countries register all births and record such things. Nor is there any centralised register.

In addition similar names can be totally different in different languages and contractions of names differ from place to place.

However, as legal Americans are registered, you can calculate the number of Americans named Stephanie: As of January 2014, Stephanie was the 60th most common name for female legal residents of America, with approximately 701928 Stephanies living.