All you can do is to send a correction to the papers from gaol saying that the information published about you has nothing to do with you, and that you're no relative of the person of that name and have no connection with him.
Zuk gauza bakarra egin dezakezu: kartzelatik egunkarietara zuzenketa bidaltzia, alegia, zutaz plazaratutako berriak ez duela zeurekin zerikusirik, eta ez zarela halako izena duen jaunaren ez ahaidea ez laguna.