Juana Maria Garza was born circa 1777, the daughter of Juan Tomas Garza and Maria Gertrudis Vela.
In 1782, she lived at Miguel Perez. The church census recorded that she was a young child, casta, and 5 years old. Her household included 7 people:
Juan Tomas Garza, casta, married.
Maria Gertrudis Vela, casta, married.
Jose Antonio Garza, casta, single.
Jose Fabian Garza, casta, single.
Maria Antonia Garza, casta, an unmarried girl, age 20.
Jose Santiago Garza, casta, a youth, age 16.
Juana Maria Garza, casta, a young child, age 5.