She was born circa 1752. Her father was Jose Valentin de Olivares, and her mother was Maria de Jesus Guajardo. Her father owned Porción 19, Mier. In 1782, she lived in San Juan Bautista del Cojo in household number 130. The church census recorded that she was married, casta, and 30 years old. Her household included 4 people.
She married Juan Eligio Casas, son of Juan de las Casas and Josefa de la Garza. He owned Porción 39, Camargo. His father owned Porción 29, Camargo, Porción 39, Camargo.
Maria Leonarda Casas, born 1774.
Maria Josefa Casas, born 1778.