My grandmother actually ordered one of these; many, many years ago, when computers were all mainframes. Most of it was a list of everybody with her surname (Bopp), presumably compiled from telephone books throughout the world. I have no idea how accurate the historical part was, but I really don't think there are any historical Bopp coats-of-arms (wouldn't German royalty be von Bopp?) I expect they're going through all the surnames with the most common first (more suckers per surname) and have finally gotten to Stross.