She was born circa 1740, and was baptized 12 Dec 1740 in Santa Rosa de Lima. Her father was Jose Joaquin de Ecay Muzquiz, and her mother was Mariana de la Garza Falcon. Her padrino was Joseph de _go, and her madrina was Juana Hernandez. Birth source: link
She married Juan Nepomuceno de Alderete, son of Vicente de Alderete and Juana Rosa Ramon on 5 Feb 1770 in Santa Rosa. She was 30 years old, and the groom was 25 years old. Marriage source: link.