The extinct Urequena language (also Urekena or Arequena) is a language variety that is closely related to Andoque. It is known only from an unpublished word list by Austrian naturalist Johann Natterer that was probably recorded in June or July 1831.
The table below adapted from Jolkesky (2016) shows similarities between Urequena and Andoque. The Urequena (Uerequena, Arequena, Orelhudos) data is from an undated 19th-century manuscript by Austrian naturalist Johann Natterer. Natterer gives the Içá River (or Putumayo River) as the location of the language.