Coolest Crossword Ever

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Across
  1. 4. first (Greek)
  2. 6. one (Greek)
  3. 7. tenth (Latin)
  4. 10. ninth (Latin)
  5. 11. four (Greek)
  6. 14. Romaan numeral for 1885
  7. 16. second (Greek)
  8. 18. single, alone (Latin)
  9. 19. twice (Latin)
Down
  1. 1. 1000 (Greek)
  2. 2. Coolest crossword maker (initials of GG)
  3. 3. two (Greek)
  4. 5. three (Greek)
  5. 6. half (Greek)
  6. 8. nine (Greek)
  7. 9. 100 (Greek)
  8. 10. nine (Latin)
  9. 12. both (Latin)
  10. 13. Roman numeral for 569
  11. 15. half (Latin)
  12. 17. one (Latin)
  13. 18. one and a half (Latin)