Addanc
Name of a lake monster from Welsh mythology that King Arthur (or Percival) was later ascribed to have killed. It is variously described as a demon, a dwarf, beaver, or crocodile. It was said to prey upon anyone foolish enough to swim in its lake. The location of the lake in which it dwells also varies: Llyn Barfog, Llyn Llion, Llyn yr Afanc.
Aglaeca
Name of a character from Beowulf, meaning both demon, monster, fiend, and hero, warrior An Old English dictionary defines áglǽca as follows: wretch, miscreant, monster, demon, fierce enemy, fierce combatant, miserable being
Ahriman
Devil; evil spirit Middle Persian form of Avestan Angra Mainyu, myth name of the god of darkness, death and destruction, and the number one enemy of Ahura Mazda.
Apep
Egyptian myth name of the personification of evil, seen as a giant snake, serpent or dragon. Known as the Serpent of the Nile or Evil Lizard, he was an enemy of the sun god. Meaning of the name is uncertain, but may be connected to the root pp, meaning to slither
Cerberus
Demon of the pit Latin form of Greek Kerberos, myth name of the three-headed dog that guards the entrance to Hades.
Crnobog
"Black god." Slavic myth name of a god of evil and darkness, the counterpart of Belobog ("white god"), the god of the sun and light, derived from cherno "black" and bog "god."
Demogorgon
Male Greek myth name of a god from the underworld, thought to be the name for Satan.
Dracul
Romanian name meaning "devil" or "dragon."
Hecate
Latin form of Greek Hekate, myth name of a goddess of witchcraft, demons, graves, and the underworld, meaning far off
Jezebel
Hebrew biblical name of the evil wife of King Ahab, meaning impure, unexalted She was eaten by dogs as prophesied by Elijah.
Lamia
Greek myth name of an evil spirit who abducts and murders children. The name means "vampire" in Latin and "fiend" in Arabic.
Matchitehew
Native American Algonquin name meaning he has an evil heart
Mukesh
Male Hindi myth name of a demon in the form of a boar who was killed by Shiva, meaning ruler of Muka
Nukpana
NUKPANA: Native American Hopi unisex name meaning evil
Satan
Biblical name of the enemy of God, derived from Hebrew satan, meaning adversary He is also known by the Greek name Diabolos, the Devil.
Seth
Greek form of Egyptian Sutekh, name of the evil god of Chaos who slew Osiris, possibly meaning "dazzle."
Sutekh
Original Egyptian form of Greek Seth or Sethos, name of the evil god of Chaos who slew Osiris, possibly meaning dazzle
Teivel
Yiddish name meaning devil
Usha
Female Hindi myth name of a demon princess, daughter of heaven, and sister of night, meaning dawn
Vritra
Hindi myth name of a dragon or serpent, the personification of drought and enemy of Indra, meaning the enveloper
Zlogonje
Serbian name meaning "expels evil."