Familias de Nochistlan Zacatecas y Teocaltiche (Saldivar, Macias, Huizar, Duran, Olmos, Luevano)

Does anyone have Mariano Olmos in there tree? If so...I've been trying for months to figure out who Mercedes Saldivar's parents are. I THOUGHT she may have come from the Duran's, but not sure. My GEDmatch number is KK6796917, my Father's is LM2514076, my Father is an Aguilar Saldivar, my Paternal Great Grandfather was Higinio Saldivar Macias (under Zaldivar or Saldivar Macias in documents), he was married to my Great Grandma Luciana Navarro Huizar, his Father was Atanasio Saldivar Duran who married MA del Refugio Macias. Then my 3rd GG was Esteban Saldivar Esqueda with Bacilia Duran, and the family goes on from there. I know Mercedes married Mariano S. Olmos who was also married to Maria Luevano...but I can't figure out who Mercedes' parents are...anyone know? I've searched everywhere! The baptismal records, the marriage records, and no luck.