Looking for information about José Santiago Rodríguez and his parents, Juan Rodríguez and María Josepha de la Cruz. 

José Santiago Rodríguez (Español) born about 1731 (a guess based upon his children's births). According to his burial record (7 Dec 1769), he was born in Zacatecas and is the son of Juan Rodríguez and María Josepha de la Cruz. 

https://www.familysearch.org/ark:/61903/3:1:S3HT-6SJ9-JKC

i can only find him in records from the 1750s onwards. He is recorded as living in San Nicolas, Calvillo, Aguascalientes (recorded in Tabasco, Zacatecas at first) and then living in Barranca, Calvillo. 

Was he born in San Nicolas Hacienda, Calvillo, which was considered Zacatecas at the time? 

I cannot find much on Calvillo prior to the 1740s. 

One clue: some later descendants used the surname Rodríguez de Frías, but neither Santiago, nor his sons, used that surname. They are recorded as simply "Rodríguez."

Any suggestions are welcome.

Thank you

Travis