Her father was Sebastian de la Garza, and her mother was Clara Guerra.
She married Miguel Rodriguez de Montemayor, son of Francisco Rodriguez de Montemayor and Maria Caballero de los Olivos.
Pedro Rodriguez de Montemayor. He married Maria Gertrudis Cavazos, daughter of Gabriel Cavazos and Isabel de la Garza.
Miguel Cayetano Rodriguez. In 1748, he requested a dispensation to marry Antonia Margarita Cavazos.