I can't answer your question about twins' names, but I can pass on some information that may, or may not help you. This may be all old news to you. My name is Todd Dull, my father's name was John Arnold Dull, & my gradfather's name was Joe Dull. My grandfather had a brother named Sam Dull. At one time we all lived in Dallas County Missouri, in Long Lane, Missouri to be exact. My dad has a sister named JoAnn, she married into the Bramwell family, I'll ask her if she may know the names you're looking for. Let me know if any of this helps. Also, let me know if our two family's are related.