Why did daenerys name a dragon after viserys?

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Tags

1. #daenerys
2. #eldest
3. #drogon
4. #brother
5. #father
6. #sister
7. #exchange
8. #viserys
9. #rhaegar
10. #throne
11. #viserion
12. #dragon
13. #targaryen
14. #season
15. #after
16. #named
17. #leaves
18. #rhaegal
19. #could
20. #namesake
21. #first
22. #drogo