Here is a list of dinosaur names beginning with J.

1. Jainosaurus
2. Jakapil
3. Jaklapallisaurus
4. Janenschia
5. Jaxartosaurus
6. Jeholosaurus
7. Jeyawati
8. Jianchangosaurus
9. Jiangjunosaurus
10. Jiangshanosaurus
11. Jiangxisaurus
12. Jianianhualong
13. Jinbeisaurus
14. Jinfengopteryx
15. Jingshanosaurus
16. Jintasaurus
17. Jinyunpelta
18. Jinzhousaurus
19. Jiutaisaurus
20. Jobaria
21. Jubbulpuria
22. Judiceratops
23. Juratyrant
24. Juravenator