She was born circa 1750. 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 1 years old. Her household had 7 people, and they did not receive government aid to move to the colony.
She married Bartolome Treviño [Jr.], son of Bartolome Treviño and Ana Maria Garcia on 13 Feb 1776 in Mier. She was 26 years old, and the groom was 25 years old. His father owned Porción 97, Camargo.