As far as twins go, I am the mom of 13-year-old identical twins, and here is what my doctor told me:Fraternal twins are the ones that run in families through the mother's side.(Mom releases two eggs; both are fertilized.)Identical twins are a fluke of nature.(One fertilized egg splits into two.)
Regarding names passed down in families, I too was always told that we were descendants of NBF.My grandfather's given name was Forest; his mother's maiden name was Forrest; there was an uncle named Bedford.But now that I have researched my Forrests, I can positively say that we are NOT descended from NBF.We may share ancestors with him, but I haven't gotten that far yet.Many people named their children after famous people.I have multiple ancestors named after George Washington, one named after John Calhoun, and one named after James Polk.It was a way of showing admiration and had nothing to do with lineage.