El Jem
No scholarly or traditional source documents a multi-headed serpent named 'El Jem' in Tunisian folklore. The entry traces to a single user-generated language-learning wiki page that echoes the input text verbatim. El Jem is the Tunisian town famous for its Roman amphitheater; the serpent is an invented figure, though Tunisian tradition does preserve serpent and jinn lore under other names.