Maria Francisca Ortiz - looking for her grandparents

Hi all. I need a little help. I am looking for a bautismo for Maria Francisca Ortiz (aka Franca). Her children’s bautismo indicate that the maternal grandparents are Franco Ortis and Maria Juana Gonzales. However, I have not found a bautismo for Maria Francisca Ortiz. I want to find out who were her grandparents.
Hope this is not too confusing.

Info for Maria Francisca Ortiz :

Husband: Jose Antonio Maldonado
Children: Maria Justa de Jesus Maldonado
Born 18 jul 1834 Tepetongo, Zac, Mexico

Maria Justa de Jesus Ortis Maldonado
1 aug 1835 Tepetongo, Zacatecas, Mex

Jose Cristobol de Jesus Maldonado
1842 Arroyo Seco de Bajo

Please Help!
Garcias.