There is an earlier NR thread about this family. Some of the information is dated and has been proven incorrect, but there's some interesting info about Maria Rubio's possible origins: https://nuestrosranchos.org/node/22015

According to one of the contributors, Pedro Hernandez cc Maria Rubio were among the founders of Lagos de Moreno. This might help support that: on 3 Feb 1569, a Pedro Hernandez was granted a titulo y merced de un sitio de estancia para ganado mayor and a caballeria de tierra in the jurisdiction of Lagos. I don’t know if it’s the same man: https://www.familysearch.org/ark:/61903/3:1:3Q9M-CSDL-J7ND-X?view=explo…

You might already have this, their son, Lic. Cristobal Gutierrez, founded a capellania in July 1621: https://www.familysearch.org/ark:/61903/3:1:9392-DGJH-Y?i=259&wc=3JWY-T…

It includes the distribution of the estate of Pedro Hernandez to his heirs, naming the entire family group, including spouses of those already married (Catalina Rubio cc Luis Lopez