Here are some Jain-friendly baby boy names starting with the letter D, along with simple meanings:

1. Darshan – Divine vision, right perception
2. Dhruv – Firm, steady, like the pole star
3. Digant – Horizon, where directions meet
4. Dikshu – Lord of directions
5. Dipak / Deepak – Lamp, light of knowledge
6. Divit – Immortal, divine
7. Devansh – Part of God, divine portion
8. Dharitri / Dharit – Supporter, one who upholds (dharma)
9. Dhaval – Pure, white, spotless
10. Divesh – Lord of light / wealth of virtues
11. Dhanesh – Lord of virtues/wealth (dhan here can be taken as good qualities)
12. Dheer / Dhairya – Patient, calm, courageous in dharma
13. Darshit – One who is seen/revealed, manifest
14. Devesh – Lord of devas (used commonly in religious context)
15. Devan – Divine, godly
16. Deeptansh – Part of the radiant light
17. Dharmik – Religious, righteous
18. Dharmin – One who follows dharma
19. Divyam – Divine, spiritual
20. Dikshit – Initiated, one who has undertaken a vow

If you tell me:

• If you prefer very short names (3–4 letters), or
• If you want names directly connected to Tirthankars / Jain principles (like Ahimsa, Samyak, etc.),

I can suggest a more focused list starting with D.