Persistence Puzzle

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Across
  1. 3. Italian name meaning "counselor"
  2. 7. Italian name meaning "cowherd"
  3. 8. Polish surname meaning "blacksmith"
  4. 9. Surname that sounds like it could belong to a Viking explorer
  5. 11. To prove more powerful than opposing forces
  6. 15. Name meaning "helpful person" in Gaelic
  7. 17. Burr, sir!
  8. 18. Meaning "defender of manking" a name shared by many French nobles
  9. 22. Name meaning "rich" or "wealthy" in Arabic
  10. 24. -- --- .-. ... .
  11. 25. "Goosebumps" author
  12. 26. Latin origins: "worthy of love"
  13. 27. Name meaning "the ruler's counsel"
  14. 30. Captain Marvel surname
  15. 31. Superman Surname
  16. 33. Name derived from a fragrant flower
  17. 34. First name of the first man on the moon
  18. 35. ...from the block
  19. 37. Surname of aviation pioneers Orville and Wilbur
  20. 38. German origins: "turnip seed"
Down
  1. 1. Greek for "crown"
  2. 2. Heavenly food from the biblical book of Exodus
  3. 4. Not higher
  4. 5. Italian for "frost"
  5. 6. Eeny, Meeny, Miny, ...
  6. 10. Meaning "noble strength" but known for having breakfast in robin egg blue environment
  7. 12. Roman goddess of love and beauty
  8. 13. Comparative of door
  9. 14. Large grassy plain in tropical or subtropical regions
  10. 16. Mmmbop
  11. 19. Mona with mysterious smile
  12. 20. German name meaning "oat man"
  13. 21. To pursue or run after
  14. 23. Like the letter before L
  15. 24. One of three (!) Italian surnames at Singularity
  16. 28. One half of Olsen Twins
  17. 29. Name that sounds like a Scandinavian dormitory
  18. 32. Family name meaning "little king"
  19. 35. Leader of the Argonauts in Greek mythology
  20. 36. Finnish name meaning "point" or "tip"