The person for my hometown on that website seems to only have been born there but moved away before elementary school, so I'm not sure how that's really all that interesting.
I grew up in Visalia, CA which lists Kevin Costner, the actor. He was in my high school class in my sophomore and part of my junior year when his family moved away. Although his later fame is what puts him there, we had a Nobel Prize-winning physicist actually grow up there but he never won an Oscar. Seems unfair.
Hulk Hogan is credited as being born in Augusta, GA; but his family moved to Florida when he was one and a half. Also, I'm not sure why Viggo Mortensen is listed way up in north Idaho, he only lived there three years?