Most of the Obregon Family research has been concentrated in the microfilms gathered at the local Family History Center. The Obregon line seems to disappear from any Sonora records after Jose Ysidro del Refugio Obregon's father, Jose Guadalupe Obregon, whose birth can be roughly estimated around 1776. I have searched the Sinaloa films, since Sinaloa at one point in Mexican history, was part of the same Diocese as Sonora. I have also researched in the Durango Diocese records because that was the main church headquarters after Mexico City as the conquest of Mexico expanded northward. Mostly without any success.I have noted a good number of Obregon families in the San Luis Potosi records but have not been able to connect with anyone of them. I have some relatives around Arizona and California. A cousin of mine in California, Frank Sanchez, has done extensive research on this Obregon line as well without too much success on Jose Guadalupe. With the Obregon name, families from Flores, Robles, Rodriguez, Galvez are also included.
My research on the Estrada line has been concentrated in the Durango records, again with not too much success. I was able to find some information in the parish at San Juan Bautista del Mezquital in Zacatecas. Evidently this parish was closer to where my family lived in Durango and it was more convenient for them to cross the state line into Zacatecas then to travel to the main church in Durango, Durango. Pedro Herrera, born roughly around 1819, is the last entry I am able to find on this line as well. This Estrada line also includes Marquez, Herrera, Abalos, Casas names.