Where does the phrase to be frank come from?

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Tags

1. #germanic
2. #javelin
3. #because
4. #english
5. #suggested
6. #after
7. #meaning
8. #conquest
9. #traditionally
10. #assumed
11. #frank
12. #norse
13. #comes
14. #taxation
15. #preceding
16. #wikipedia
17. #article
18. #franca
19. #franks
20. #adopted
21. #frakka