Hades (/ˈheɪdiːz/; Ancient Greek: ᾍδης or Άͅδης, Háidēs) was the ancient Greek chthonic god of the underworld, which eventually took his name.
In Greek mythology, Hades was regarded as the oldest son of Cronus and Rhea, although the last son regurgitated by his father. He and his brothers Zeus and Poseidon defeated their father’s generation of gods, the Titans, and claimed rulership over the cosmos.
[Source: https://en.wikipedia.org/wiki/Hades (2017-01-18)]
Athena (/əˈθiːnə/; Attic Greek: Ἀθηνᾶ, Athēnā, or Ἀθηναία, Athēnaia; Epic: Ἀθηναίη, Athēnaiē; Doric: Ἀθάνα, Athānā) or Athene (/əˈθiːniː/; Ionic: Ἀθήνη, Athēnē), often given the epithet Pallas (/ˈpæləs/; Παλλὰς), is the goddess of wisdom, courage, inspiration, civilization, law and justice, strategic war, mathematics, strength, strategy, the arts, crafts, and skill in ancient Greek religion and mythology. Minerva is the Roman goddess identified with Athena.
[Source: https://en.wikipedia.org/wiki/Athena (2015-03-23]]
Mercury (ˈmɜrkjʉri/; Latin: Mercurius) is a major Roman god, being one of the Dii Consentes within the ancient Roman pantheon. He is the patron god of financial gain, commerce, eloquence (and thus poetry), messages/communication (including divination), travelers, boundaries, luck, trickery and thieves; he is also the guide of souls to the underworld.
[Source: http://en.wikipedia.org/wiki/Mercury_(mythology) (2014-09-14)]