Romo (de Vivar) Family in Jalisco and Aguascalientes

I'm new to this, and I need help connecting my GGG grandfather José de los Santos Romo de Vivar (b.1807) to what seems to be the original location of most of the Romo de Vivar family in the region of Aguascalientes. I have discovered through family records and FamilySearch transcribed christening records a lineage that takes me back to Bernabe ROMO, listed on a baptismal certificate as the father of Gregorio ROMO (b. abt 1780) of Encarnación (de Díaz), Jalisco. But I am having trouble pinning him down. I have found a Bernave ROMO DE VIVAR who married Anna Gertrudis FRANCO in 1761 in Tepatitlán, Jalisco--and those are the names of my ancestor's parents. But the trail goes cold in Tepatitlán, because I can't find out any more about Bernabe (Bernave) ROMO DE VIVAR, even though I am pretty sure that is his correct name.

I have found an IGI record of a man called Bernabe ROMO-DE-VIVAR who was born in 1740 in Rincon de Romos, in the state of Aguascalientes. The only thing that makes him a good candidate is that he was born at the right time, about 20 years before the marriage of Anna Gertrudis FRANCO in 1761--in Tepatitlán, which is pretty far away from Aguascalientes. And to make things worse, there is an IGI listing for a man with exactly the same name who was born 20 years earlier in Rincon de Romos, which is even farther away from Tepatitlán.

How confusing!

I need help finding the right Bernabe (Bernave) Romo de Vivar and getting back on the trail!