Bezos parents were teenagers of no significant means. After they divorced, his mother married an "uneducated" (in the sense he had not attended college) Cuban immigrant, Miguel Bezos, again of no significant means. After Miguel graduated from the elite University of New Mexico, they moved to Houston so he could work for Exxon. During high school Jeff took on an elite internship working the morning shift at McDonalds.

It's not entirely rags to rich because gramps indeed did well for himself and had a nice big ranch out in the middle of Nowhere, Texas. But it's pretty close to it, and overall a pretty cool story.