Why do they call daenerys khaleesi?

Related questions

1. Do Jon Snow and Daenerys know they are related?
2. What episode did Ned Stark die?
3. How much did the cast of Friends make?
4. Is Arya Stark the waif?
5. Does Game of Thrones make money?
6. Is Tyrion dead?
7. Who all has Nick Jonas dated?
8. Is Sophie Turner engaged?
9. Can Jon Snow control the dragons?
10. Who got paid the most in friends?

Tags

1. #targaryen
2. #stormborn
3. #smuggled
4. #viserys
5. #exiled
6. #introduced
7. #robert
8. #daenerys
9. #dynasty
10. #rebellion
11. #during
12. #called
13. #essos
14. #brother
15. #princess