Hi. I have a question. My great grandfather's last name was Diaz. All I know is they came from Zacatecas to Tamaulipas (northern Mexico). Do you know if the Diaz de Leon last name is the same as the Diaz. Im at a dead end when I search for him in Zacatecas, which leads me to believe that maybe he took out the de Leon last name when he relocated to Tamaulipas.