Here are some Jain boy names starting with “D”:

1. Daksh
2. Darshan
3. Darshil
4. Darshit
5. Darpan
6. Deevansh
7. Devansh
8. Devendra
9. Devesh
10. Dhairya
11. Dhanesh
12. Dhanraj
13. Dharm
14. Dharmaansh
15. Dharmesh
16. Dharmil
17. Dharmik
18. Dharv
19. Dhir
20. Dhiraj
21. Dhruv
22. Divit
23. Divyam
24. Divyang
25. Dixit / Dikshit
26. Dravya
27. Drashtin
28. Dravish
29. Dvij
30. Dwijendra

Most of these are commonly used in Jain families and relate to virtues, religion (dharma), or auspicious qualities.