Emma is not Emma Stone’s real first name. It is a stage name she came up with when she was 16 because the Screen Actors Guild told her she could not go by Emily Stone. There was already someone else in the union with the name.
Today, when she was on Live with Kelly and Ryan, she told them that Emma was not her first choice. What was then? She tried out the name Reily. She liked the name; she just wasn’t used to it. So while she was guest-starring on Malcolm in the Middle, she ignored people when they called her that.
Therefore, after a two-month trial period, she went with Emma because it was close enough to Emily. And the rest is Hollywood history.
Personally, I think she should have gone with Rosetta. What name do you think would work for her?