Que tal,
 
I saw your posting on your website.  The Hermosillo family name is truncated from the Casillas family name.  We've been using birth certificates and previous work done by Alberto Casillas in his book titled the "Casillas" to trace back the Casillas family .
 
Including DNA sampling which resulted in R1b1.
 
By adding the Casillas back in the name you can get all the previous ancestors. 
 
These are my fathers:
 
Moises Casillas Diaz
Quintin Casillas Gomez
Panfilo Casillas Ulloa
Nazario Casillas Gutierrez
Francisco de la Trinidad Casillas Villapando
Jose Maria Casillas Gonzalez de Hermosillo
Jose de San Ramon Casillas Casillas
Jacinto Ventura Casillas Lozano
Francisco Casillas y Cabrera III
Francisco Casillas y Cabrera II
Francisco Casillas y Cabrera I
Martin Casillas (Spain, he built the cathedral in Guadalajara)