His father was Juan Tomas Garza, and his mother was Maria Gertrudis Vela. In 1782, he lived in Miguel Perez in household number 145. The church census recorded that he was single, casta. His household included 7 people.
He married Maria Trinidad Gutierrez, daughter of Ignacio Gutierrez (household) and Maria Juliana Gutierrez (nat) on 29 Jan 1800. the bride was 24 years old.
He married Maria Antonia de las Casas.