Surely Winston Churchill's ancestry is well known. It is avabilable easily on the Internet, even. A simple Google search for Winston Churchill genealogy should find you tons of information. Churchill is descended from a gentry family originally named Courcelle and settled in Devon since the Conquest. By the way, the story that Jennie Jerome had American Indian blood is myth and has been dismissed by most reliable researchers. It is a myth that Churchill himself mischievously put about.