Hello, I am trying to locate some information about my great grandfather, Andres De Herrera. He was listed in the 1870 census for Rio Arriba county, Yunque province. What I am trying to locate is some information about his birth parents. He was adopted or taken by a family by the name of Herrera, with a Francisco Herrera being the head of the family. I am trying to find out if Francisco was his father, or if he was only adopted or taken. We know he was at least half Navajo, but I suspect that he was a Navajo taken in by this Herrera family.