| "Grendel" may be referring to two or more different villains. If you're uncertain which one you're looking for, just flip a coin.|
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- Grendel (Beowulf) - a monster fought by the warrior Beowulf and the man antagonist of the epic poem Beowulf.
- Grendel (The Wolf Among Us) - a shapeshifting creature and a character in the videogame The Wolf Among Us based of the popular comics series Fables.
- Grendel (DC) - a monster that Wonder Woman had to deal with.
- Grendel (Marvel) - a monster that Thor was fighting.