I am looking for information about Valero and Quintanilla last names. If they are jewish any information will be helpful. I am catholic however my family has several customs that what i've been told are jewish. When someone dies they cover the mirrors in the house. Also when someone dies they pray in a group like a minyan.

It could certainly be Jewish Sephardic surnames. Some in this same tread post a long list of Sephardim surnames. However, with the information given by yourself it's very difficult to assure if this surnames are Sephardic or well they come from generations of assimilated Christians, Catholics or Conversos.

In brief to establish a Sephardic ancestry you must:
1. Have well recognized Jewish traditions and rituals, whether being religious Jew or not.
2. Trial papers indicating your family came from a Sephardic defined line and
3. DNA tests help, but the are not definitive to indicate an ethnic ancestry.

Hope this letter will help you to clarify your question,

Yours truly

Jesse

Thank you for the information