She was born circa 1753, and was baptized 8 Dec 1753 in Santa Rosa. Her father was Vicente de Alderete, and her mother was Maria Josefa Garcia de Rivera.
She married Miguel Francisco Ecay Muzquiz, son of Jose Joaquin de Ecay Muzquiz and Mariana de la Garza Falcon on 26 Feb 1781 in Santa Rosa. She was 28 years old, and the groom was 35 years old.