Hello, I hope you get this note. I see you inquired in 2003. My grandmother was from Sonora. She had the last name Corella from her mother. My aunt made several trips to Spain and found the town Called Corella in the province of Navarre (Basque country). There is a historical jewish town called Tudela that is close by Corella. My aunt was truly convinced that our maternal line ancestors who came with the last name of this town were Sephardim.