The place name of Cetona or Citonia (local variation) probably comes from the Latin word caedita, "felled, deforested" with regard to a deforested and cultivated place. An early Christian baptistery, now a parish church, mentioned in documents as baptisterium Sancti Johannis de Queneto or de Queteno, may have been named in reference to the Chieteno stream that flows just south of Cetona.