Eponyms of Greek, Roman and Nordic origin

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Across
  1. 4. a forty-two-kilometer race; after a battle between Persians and Greeks
  2. 7. changeable; moody; after the Greek messenger god
  3. 8. of great strength; after a Greek demi-god associated with 12 labors
  4. 10. a jaunty and fit woman; from a tribe of mythical female warriors
  5. 11. food or drink working as a sexual stimulant; from the name of the Greek goddess of love and beauty
  6. 12. ~ complex; sexual desire of a man for his mother; after a fabled Greek king
  7. 15. a person characterized by self-importance and need for admiration
  8. 16. ~ complex; sexual desire of a woman for her father; after a Greek, mythical heroine
  9. 19. a day named after the supreme Nordic god (this one had many a name)
  10. 20. one of the days of the week; after the Nordic goddess Frigg/Frea, the wife of Odin
Down
  1. 1. an anesthetic named after the Greek god of sleep
  2. 2. the month named after the Roman god of duality and beginnings
  3. 3. torment or tease with the sight or promise of something that is unobtainable; after a mythological king punished by the gods with the receding sight of food and water
  4. 5. one’s weakness(idiom); Achilles’ ~
  5. 6. a person having characteristics of both male and female bodies
  6. 7. a metallic element which at room temperature retains liquid state; after the Greek messenger god
  7. 9. the month named after the Greek god of war
  8. 10. tendon the link between the calf and the heel; Achille’s ~
  9. 13. a gigantic tomb
  10. 14. a day named after the Nordic god of strength and thunder
  11. 17. showing homosexual desire for women; after the Greek island, home to a Greek poet Sappho
  12. 18. an attractive, well-bulit man;