Why are the targaryens called dragons?

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Tags

1. #targaryen
2. #valyrian
3. #dragons
4. #trained
5. #strong
6. #families
7. #daenerys
8. #targaryens
9. #viserys
10. #headed
11. #called
12. #dragon
13. #black
14. #noble
15. #family
16. #descendants
17. #field
18. #known
19. #three