He was born circa 1747. His father was Francisco de la Garza, and his mother was Maria Candida Garcia Sepulveda. His father owned land in Porción 65, Camargo.
He married Maria Rita Barrera, daughter of Juan Ignacio Barrera and Manuela Flores on 1 Dec 1772 in Mier. He was 25 years old, and the bride was 20 years old.