She was born circa 1741. Her father was Francisco Guerra, and her mother was Ana Josefa de la Garza. Her father owned Porción 66, Mier. In 1750, she lived in Camargo. The census recorded that she was the daughter of a settler, and 7 years old. Her household had 7 people, and they did not receive government aid to move to the colony. In 1782, she lived in Mier in household number 36. The church census recorded that she was an unmarried girl, española, and 42 years old. Her household included 8 people. In 1791, she lived in Mier in household number 30. The church census recorded that she was an unmarried girl, española, and 51 years old. Her household included 6 people.