Don't feel bad. Ancestry gave me that thing for famous people in my tree. Turns out, I'm related to several of them on both sides. Your grandma mentioned is probably grandma on one side and great grand aunt on another or something.
... Or your parents are secretly flowers in the attic-ing you, in which case do not allow yourself to be locked in the attic. Always carry your cell to call the police.
This has been my dream for years. I long for the day when science splices human DNA and pygmy marmoset DNA, creating tiny little borrower people. I will build them doll houses and ask for nothing in return. They will be too pure and good for capitalism, they must be provided for.