She was born circa 1759. Her father was Jose Valentin de Olivares, and her mother was Maria de Jesus Guajardo. Her father owned Porción 19, Mier. In 1750, she lived in Camargo. The census recorded that she was the daughter of a settler, and 8 years old. Her household had 8 people, and they did not receive government aid to move to the colony.
She married Alejandro Casas.