She was born circa 1773. Her father was Jose Antonio Garcia, and her mother was Maria de la Merced Tanguma.
In 1782, she lived in Miguel Perez in household number 146. The church census recorded that she was a child, casta, and 9 years old. Her household included 7 people:
Jose Antonio Garcia, married, casta, age 36.
Maria de la Merced Tanguma, married, casta, age 26.
Maria Cecilia Garcia, an unmarried girl, casta, age 13.
Jose Damian Garcia, a child, casta, age 11.
Maria Dionicia Garcia, a child, casta, age 9.
Juana Maria Garcia, a young child, casta, age 5.
Maria Nicolasa Garcia, a young child, casta, age 4.