Placeholder name for prisoners
* Ben Zygier, held in Ayalon Prison in Israel until his death there in 2010 **Ali-Reza Asgari, incorrectly asserted to be Prisoner X by the Tikun Olam blog * Avri Elad (died 1993), the "third man" or "X" in the Lavon Affair, held in Ayalon Prison * Marcus Klingberg, held from 1983 to 2003 in Israel * Prisoner X2, an unidentified prisoner held in Ayalon Prison from about 2004 until 2018 * Tomer Eiges, or "Officer X", died in military prison awaiting trial in 2021Other uses
* ''Age of X-Man: Prisoner X'', a 2019 comic book, part of the '' Age of X-Man'' crossover * ''Prisoner X'', a 2015 Canadian film {{disambiguation Journalism lists Placeholder names