Across
- 3. half (Latin)
- 4. 100 (Greek)
- 5. Roman numeral for 569
- 7. ninth (Latin)
- 9. twice (Latin)
- 10. Romaan numeral for 1885
- 13. nine (Greek)
- 14. fourth (Latin)
- 18. half (Greek)
- 19. one (Greek)
- 20. four (Greek)
- 21. 1000 (Greek)
Down
- 1. both (Latin)
- 2. one and a half (Latin)
- 3. single, alone (Latin)
- 5. tenth (Latin)
- 6. two (Greek)
- 8. nine (Latin)
- 11. second (Greek)
- 12. three (Greek)
- 15. one (Latin)
- 16. first (Greek)
- 17. Coolest crossword maker (initials of GG)