Don Carlos Ometochtzin (Nahuatl for "Two Rabbit"; pronounced /oːmeˈtoːtʃ.tsin/) or Ahuachpitzactzin was a member of the Acolhua nobility who was burnt at the stake on November 30, 1539 at the order of Juan de Zumárraga, the first Catholic bishop of New Spain, for continuing to practise the pre-Hispanic religion.
Don Carlos was a grandson of the famous Texcocan ruler Nezahualcoyotl through his son Nezahualpilli.
- García Granados, Rafael (1952). "111 Ahuaxpitctzatzin". Diccionario Biográfico de Historia Antigua de Méjico. Mexico: Instituto de Historia. pp. vol. 1, pp. 34–37.
- González Obregón, Luis (ed.) (1910). Proceso inquisitorial del cacique de Texcoco. Mexico: Archivo General de la Nación.