His father was Sebastian de la Garza, and his mother was Clara Guerra.
He married Agustina de Quintanilla.
He married Margarita de Quintanilla. It was his second marriage.
Jose Salvador de la Garza. He married Maria Antonia de Elizondo, daughter of Javier de Elizondo and Maria Antonia Arizpe. He married Juana Maria Flores.
Pedro de la Garza. He married Maria Josefa Elizondo, daughter of Juan de Elizondo and Maria Antonia de la Serna Alarcon.
Joseph Anastacio de la Garza. In 1750, he requested a dispensation to marry Francisca Javiera Cavazos.