My grandmother was a Monreal. Maria Luisa Monreal from San Ignacio, Mexico. This is our family's home town. The Monreal's and the Rivera's are closely related there and have often intermarried. There are several Monreal's living in the Los Angeles area. I have a close 2nd cousin who studies the history of the family. Let me know if you'd like to get in contact with her. She might know more.