Deimos (deity)

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Personification of terror
AbodeMount Olympus
Personal information
ParentsAres and Aphrodite
SiblingsErotes, Phobos, Phlegyas, Harmonia, Enyalios, Thrax, Oenomaus, and Amazons
Roman equivalentFormido or Metus

Deimos /ˈdmɒs/ (Ancient Greek: Δεῖμος, pronounced [dêːmos], meaning “dread”) is the personal god of dread and terror in Greek mythology. He was a son of Ares and Aphrodite, and the twin brother of Phobos. Deimos served to represent the feelings of dread and terror that befell those before a battle, while Phobos personified feelings of fear and panic in the midst of battle.

The god’s Roman equivalent was Formido or Metus.


Deimos was the son of Ares and Aphrodite.[1] He mainly appears in an assistant role to his father who causes disorder in armies and does not appear as an independent figure in mythology. In the Iliad, he accompanied his father, Ares, into battle along with the Goddess of Discord Eris and his twin brother Phobos (fear).[2] In Shield of Herakles, Phobos and Deimos accompany Ares into battle and remove him from the field once he is injured by Herakles.[3] In Nonnus' Dionysiaca, Zeus arms Phobos with lightning and Deimos with thunder to frighten Typhon.[4] Later in the work, Phobos and Deimos act as Ares' charioteers to battle Dionysus during his war against the Indians.[5]

On the modern monument to the battle of Thermopylae, as well as the one at the city of Sparta, Leonidas' shield has a representation of Deimos.


Deimos is the namesake for the smaller of Mars’ two moons, which was named by Asaph Hall.[6]


  1. ^ Hesiod, Theogony, 933
  2. ^ Homer, Iliad, 4.436
  3. ^ Hesiod, Shield of Heracles 460
  4. ^ Nonnus, Dionysiaca, 2.414
  5. ^ Nonnus, Dionysiaca, 29.364
  6. ^ Hall, A (1878). "Names of the Satellites of Mars". Astronomische Nachrichten. 92: 47–48.