She was born circa 1746. Her father was Gaspar Garcia, and her mother was Maria Gertrudis de la Barrera. Her father owned land in Porción 1, Mier. In 1750, she lived in Camargo. The census recorded that she was the daughter of a settler, española, and 4 years old. Her household had 3 people, and they did not receive government aid to move to the colony.