His father was Francisco Rodriguez de Montemayor, and his mother was Maria Caballero de los Olivos.
He married Maria Josefa de la Garza, daughter of Sebastian de la Garza and Clara Guerra.
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.