​XIUTLALTZIN (see-oot-lahl-tzeen'), queen of Tollan, daughter of the 6th king, Mitl, whom she succeeded in 1038. She was the only woman that reigned over the Toltecs, Acolhuas, or Aztecs, but it seems that her husband, whose name is not even recorded, was either not entitled by his family to sovereign dignity, or that he died before Mitl's decease. After a short reign, which is eulogized as beneficial to the country, she was succeeded by her son, Tepancaltzin (q. v.), in 1042.