Her father was Pedro de Vargas, and her mother was Maria Margarita Rendon.
In 1750, she lived in Camargo. The census recorded that she was the daughter of a settler. Her household had 4 people, and they did not receive government aid to move to the colony:
Pedro de Vargas, head of household, soldier, español, 45 years old
Maria Margarita Rendon, mestiza
Matias de Vargas, son, 7 years old
Gertrudis de Vargas, daughter