Steven,
I will try to contact my family members from Jalpa. My family connection with Jalpa as far as I can tell begins in 1925 when my mother's uncle Agustin Olmos Avelar marries his first cousin Juana Olmos Valenzuela in Jalpa Zac. We have many family members from that line living here in San Jose and Newark Ca.
I have been trying to recruit this third cousin twice removed, to enter into family research so she can help me with the Jalpa family line.
I have noticed in a few documents from Tlachichila and Nochistlan that often reference events that occurred in Jalpa. I don't know if that means that they recorded a baptism or marriage for Jalpa as a duplicate to Jalpa or in lieu of Jalpa.
I do have Gomez family connections from Nochistlan/Jalpa but I don't have the paper trail yet, all I have is the oral history, stories from aunts and uncles. My paternal Great Grandmother was Tiburcia Garcia, Gomez and her mother was Josefa Gomez, however I don't have birthdates for them yet