Juan Jose de la Garza was baptized on 13 Jan 1771, the son of Francisco Angel de la Garza and Maria Cayetana Peña.
He married Gertrudis Cuellar on 1 Feb 1796 in Mier.
In 1782, he lived at El Arcabuz. The church census recorded that he was a child, español, and 10 years old. His household included 10 people:
Francisco Angel de la Garza, español, married, age 46.
Maria Cayetana Peña, española, an unmarried girl, age 39.
Maria Juana de la Garza, española, an unmarried girl, age 20.
Jose Marcelino de la Garza, español, a youth, age 18.
Maria Balbina de la Garza, española, a child, age 14.
Pablo Jose de la Garza, español, a child, age 12.
Juan Jose de la Garza, español, a child, age 10.
Maria Salome de la Garza, española, a young child, age 7.
Carlos Valentin de la Garza, español, a young child, age 5.
Jose Rafael de la Garza, español, married, age 0.66.