Becky, Welcome to our group.

As noted with the previous comment, Jalpa is very difficult to gather older family info, as many records that are typically available in most parishes are just not available for Jalpa.

With that said, Apolonio Romero is the son of Antonio Romero and Benancia Cobarrubias. Whether this is your Apolonio Romero is still unclear.

There were not many Apolonio Romero's listed in all the available padrons for Jalpa. In the 1826 Padron, I believe all the smaller nearby areas (such as Santa Ysabel) were included in the Puesto of Acapepesco.
https://www.familysearch.org/ark:/61903/3:1:3QSQ-G9K8-KRZ3?i=83&cat=230…
On image 84 of 2000 are:
Antonio Romero - Listed first (Normally head of household)
Venancia Cobarrubias - Spouse
Likely children listed were:
Juana Maria Romero
Anna Maria Romero
Jose Apolonio Romero
Maria Josefa Romero
Maria Torivia Romero
The last two children were listed as P (Parbula), All others as A (Adult)

https://familysearch.org/ark:/61903

Hello Becky,

Jalpa is a tough one, because of all of the holes in the church records. Doing a general search, those names appear nowhere else, so Apolonio and Maria Jesus were likely born and married in Jalpa. But as you know, there are no marriage records for Jalpa between 1838 and 1864 (marriage informations).

Have you looked at the padrones? These are censuses. They are not indexed, so you have to look through each page to find your names. They usually have head of household and the family group w/ages. I recommend going backwards in years: starting in 1885, look for Apolonio & Ma Jesus, then look at 1846, which was likely before they married - maybe you’ll find them living with their parents. “Apolonio Romero” is a rare name+surname combination, and he was probably the only one with this name in Jalpa during those years. Here are three padrones that he might appear in. There are earlier ones on the same roll:

1885
https://www.familysearch.org/ark:/61903/3:1:3QSQ-G9K8-KTWB?i=550