She was born circa 1742. Her father was Domingo Cristobal de Sosa, and her mother was Maria de la Ascencion. Her father owned Porción 41, Camargo. In 1750, she lived in Camargo. The census recorded that she was the daughter of a settler, and 8 years old. Her household had 7 people, and they did not receive government aid to move to the colony.
She married Clemente Vargas, son of Domingo de la Trinidad Vargas and Maria Josefa Solis. He owned .