She was born circa 1789. Her father was Jose Antonio de la Garza, and her mother was Maria Trinidad Cuellar.
In 1791, she lived in Mier in household number 6. The church census recorded that she was a young child, española, and 2 years old. Her household included 5 people:
Dn Jose Antonio de la Garza, married, español, age 39.
Da Maria Trinidad Cuellar, married, española, age 20.
Alejandro de la Garza, a child, español, age 12.
Gertrudis de la Garza, a child, española, age 1.
Maria Juana de la Garza, a young child, española, age 2.