Javier, Etxebarri, Etxeberria, Chávarri are names with the same Basque etymons.
Like in old pastoral romances, many of the characters from Caso Karen are depictions of real people: in "Karen del Korral" Lucía Etxebarria's personality traits are observed; "Carina Martinell" is Carmen Balcells; "Armando Sala" is Antonio Gala, etc.