In the instances where the title is used it seems to apply mainly to the mother or grandmother of the king, such women being given royal respect, for example, Jezebel the mother of King Jehoram of Israel. (2 Ki. 10:13)
... However, Athaliah, the daughter of wicked King Ahab of Israel and his wife Jezebel, after the death of her son Ahaziah king of Judah, destroyed all the kingdom heirs except Ahaziah’s son Jehoash, whom Ahaziah’s sister Jehosheba hid.