Elamite language
According to Jules Oppert, the word "Ūvja", was pronounced as "Xuz" or "Khuz" in the Elamite language. The word Ūvja appears abundantly in many texts and on Achaemenid inscriptions at Naqsh-e Rustam, and on Darius's epigraphs at Persepolis and Susa among others Ūvja, or its Greek counterpart "Uxi", were names used to refer to the land or the peoples inhabiting the land of Khuzestan.