I'm trying to use DNA to find a lost ancestor, and it can be a lot of work, especially since few people will respond. It would be useful if you could get your mother to test. Testing your mother would definitively rule out all of your maternal matches. If you search Google for DNA adoptions, you'll see a few useful sites which can give you more detailed information about how to pursue finding someone in your situation. You are definitely not alone. Leyba might be a more common spelling of the surname. Since none of my cousins responded on what I assume is my great-grandmother's side of the family, I started building their trees backwards in Wikitree to try to figure out how they are related to each other. It's taken hours of work, but I am finally figuring how out some of my cousins are related to each other. My ancestor is hidden in one of those trees, and I am determined to find her. I read an account of someone who was adopted who essentially did the same thing, except that she had help with the project. So it can be done, and you just have to keep working at it. Also, eventually you might find someone who responds--maybe.
