#7 Albert and Elsa Einstein
Considered one of the smartest men alive, you would not think that Albert Einstein would have married someone related to him. Yet, here we are, as he did, in fact, marry his cousin, but it also gets complicated. Elsa Einstein was not only his first cousin on his mother’s side, but she was also his second cousin on his father’s side! Talk about multiple degrees of being related.
They had known each other since they were children, having spent their summers together until Albert moved to Milan when they were teenagers. Having no connection afterward, Elsa married a textile trader by the name of Max Lowenthal, with whom she had three kids, out of which only two made it past infancy. Eventually, they divorced, and she moved with her daughters back to Berlin, where she was reintroduced to her cousin Albert.
At that time, Albert was married to his first wife, Mileva Maric, but this did not stop the two from falling in love. After Albert divorced Mileva, he and Elsa got married within three months!