Board Thread:General Discussion/@comment-25548156-20141011232805/@comment-12265996-20141019181336

So I just realized that Stan would have to have a brother for Dipper and Mabel to have the same last name as Stan. I'm going to step off the deep end and say, IT'S STANLEY. Think about it the twins didn't get sent to their grandpas for the summer, they got sent to their great uncles. Maybe,I don't know... THEIR GRANDPA VANISHED AND STAN'S TRYING TO GET HIM BACK.