Why was Diana's title Princess?

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Tags

1. #royal
2. #queen
3. #functions
4. #diana
5. #undertook
6. #represented
7. #style
8. #marriage
9. #title
10. #overseas
11. #duties
12. #would
13. #wales
14. #became
15. #behalf
16. #until
17. #known
18. #inherited
19. #retain
20. #spencer
21. #after
22. #princess
23. #father