Phobos (Greek: φόβος, fear) is the god of fear in Greek mythology, son of Ares and Aphrodite. Twin brother of Deimos (terror), he symbolizes fear and accompanies his father on the battlefields, injecting into the hearts of enemy combatants the cowardice and fear that made them flee, as if facing a ghost. He gave rise to the word phobia.
In classical Greek mythology, Phobos is another personification of the fear brought on by war, and does not appear as a character in any myth. Timor or Timorus is his Roman equivalent in Roman mythology, he was also referred to as Pavor.