He was born circa 1776. His father was Jose Maria de la Garza, and his mother was Maria de la Rosa Bravo.
He married Maria Gertrudis de la Garza, daughter of Juan de la Garza and Maria Gertrudis Chapa on 4 Nov 1799. He was 23 years old, and the bride was 30 years old. Her father owned Mier 23 grant.