Maria Gertrudis Garcia was born circa 1772, the daughter of Diego Garcia and Maria Gertrudis Salinas.
In 1782, she lived in Mier. The church census recorded that she was a child, española, and 10 years old. Her household included 8 people:
Diego Garcia, español, married, age 44.
Maria Gertrudis Salinas, española, married, age 42.
Juan Ygnacio Garcia, español, single, age 23.
Maria Antonia Garcia, española, an unmarried girl, age 19.
Maria Josefa Garcia, española, an unmarried girl, age 17.
Pioquinto Garcia, español, a youth, age 15.
Maria Juana Garcia, española, an unmarried girl, age 13.
Maria Gertrudis Garcia, española, a child, age 10.