User blog comment:FairyRaven/Fairy Tail Chapters 338, 339, 340: Review and Commentary/@comment-15267891-20130705135438/@comment-77.194.131.168-20130705140407

Hades is the greek name for underworld and is the name of the god of the underworld, Tartarus or Tartaros was the deepest and the most evil area of the underworld.