Jose Antonio Garcia was born circa 1756, the son of Gaspar Garcia and Maria Gertrudis de la Barrera.
He married Gertrudis Flores on 9 May 1784 in Mier.Their padrinos were Manuel [Jr.] Hinojosa and Maria de los Santos Garcia.
In 1782, he lived in Mier. The church census recorded that he was single, español, and 26 years old. His household included 7 people:
Don Gaspar Garcia, español, married, age 52. He owned Rancho Guardado but did not live there.
Doña Maria Guadalupe Flores, española, married, age 42.
Jose Antonio Garcia, español, single, age 26.
Jose Carlos Garcia, español, a youth, age 16.
Jose Tomas Garcia, español, a child, age 13.
Maria Francisca Garcia, española, a child, age 10.
Maria Ana Garcia, india, an unmarried girl, age 23.