John, My uncle took an autosomal DNA test when he was in his late eighties, and his grandfather was 72 when his father was born, so his DNA information is showing up on profiles of people born in the early 1600s. (My great grandfather was born in 1805, and my grandfather in 1877. We've used yDNA and great paper trails of several cousins to confirm their Smith paternal lines back to the 1600s also.)