She was born circa 1781. Her father was Jose Antonio Garcia, and her mother was Maria Francisca Bazan.
In 1782, she lived in Mier in household number 55. The church census recorded that she was a young child, casta, and 1 years old. Her household included 6 people:
Jose Antonio Garcia, married, español, age 31.
Maria Francisca Bazan, married, casta, age 22.
Maria Josefa Garcia, a child, casta, age 7.
Jose Antonio Garcia, a young child, casta, age 4.
Maria Eusebia Garcia, a young child, casta, age 1.
Maria Marcelina Bazan, an unmarried girl, casta, age 16.