He was born circa 1746. His father was Francisco de la Garza. He was an adopted child.
He married Maria Josefa Moreno, daughter of Antonio Moreno and Juana Casas on 1 Jul 1772 in Mier. He was 26 years old, a native of Camargo, and the bride was 11 years old. The priest recorded his race as indio, and his wife's race as mulata. Marriage source: link.
In 1782, he lived in Miguel Perez in household number 149. The church census recorded that he was married, indio, and 36 years old. His household included 5 people:
Jose Cristobal Garza, married, indio, age 36.
Maria Josefa Moreno, married, india, age 21.
Maria Viviana Garza, a child, india, age 8.
Jose Eugenio Garza, a young child, indio, age 6.
Maria Agustina Garza, a young child, india, age 6.