She was born circa 1764. Her father was Ramon Guerra, and her mother was Rosalia Hinojosa. Her father owned land in Porción 6, Mier. In 1782, she lived in San Lorenzo de las Minas in household number 76. The church census recorded that she was an unmarried girl, española, and 18 years old. Her household included 8 people.
She married Jose Antonio Peña Maldonado, son of Jose Antonio Peña and Ana Gertrudis Maldonado on 14 Oct 1790. She was 26 years old, and the groom was 20 years old.