He was born circa 1776. His father was Jose Cristobal Garza, and his mother was Maria Josefa Moreno.
In 1782, he lived in Miguel Perez in household number 149. The church census recorded that he was a young child, indio, and 6 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.