An index to the catalogue of wills and estate inventories registered by the inhabitants of Santiago, Nuevo Leon, Mexico, from 1726 to 1876. Each item includes dates and members of the family mentioned in the original document. Microfilms collected by Eugenio del Hoyo and deposited at the Fondo para la documentación de la historia del noreste de México, Biblioteca Cervantina, Tecnologico de Monterrey, were used as sources.