My iPad call me as another name. Why?

Hello! Few years ago I on my first iPhone I create Apple account. And I write the first name as "Fewdas". I want to change this name, in my Apple account I edit this name, but new apps (games) on my new iPad 2 Air on start call me as "Fewdas" in this time. I need to change this name, in my account I write another name, where my iPad take this "Fewdas" in this moment? How to I change it, if my account a long time don't have this old name? (sorry for bad english, and thanks for answers)