What is a king called in Russia?

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Tags

1. #english
2. #latin
3. #rulers
4. #translated
5. #finally
6. #became
7. #imperators
8. #emperors
9. #first
10. #imperator
11. #russian
12. #tsars
13. #adopted
14. #great
15. #russia
16. #following
17. #emperor
18. #describe
19. #peter
20. #referred
21. #reign