He was born circa 1700. His father was Sgt. Major Juan de la Garza Falcon, and his mother was Maria Margarita Rodriguez de Montemayor (?).
He married Francisca Guerra Cañamar de la Garza, daughter of _ de la Garza.
Ana Josefa de la Garza, born 1737. She married Jose Antonio Canales, son of Jose Blas Canales and Maria Rosa Caterina Anzaldua on 19 Mar 1755 in Cerralvo.