Of all the family I've come across on this the paternal side, the commonality among them is that their roots all center around the Santo Tomás region. Some of the other towns include but are not limited to: Basuchil, Papigochic, and Cuauhtémoc, Chihuahua, Mexico. If you are a BLANCO and your family has roots from around this region, there's a good chance I can help you in your search for ancestors; or perhaps you may be able to help me, as I can only go back in my paternal lineage as far as the late 18th-century, and I will not quit until I get to the Dark Ages or Ancient Rome, either one will do.