Here are Jain baby boy names starting with the letter “D” and their simple meanings:

1. Darshan – Right vision, spiritual insight
2. Devansh – Part of the divine
3. Dharam / Dharm – Religion, righteousness
4. Dharamraj – King of dharma (righteousness)
5. Dhruv – Steady, firm, constant (also a famous child-devotee in stories)
6. Digant – Horizon, end of directions
7. Dikshant – One who has taken diksha, or related to initiation
8. Divit / Divit – One who conquers (victorious)
9. Divyaansh / Divyansh – Part of the divine light
10. Devendra – Lord of devas (deities)
11. Devraj – King among gods
12. Deepansh – Part of the lamp, one who spreads light
13. Deepak – Lamp, one who brings light
14. Dheer / Dhir – Patient, calm, courageous
15. Dhiraj – Patience, endurance
16. Dhanesh – Lord of wealth (can be taken as spiritual wealth too)
17. Dharmesh – Lord of dharma
18. Dhaval – Pure, white, spotless
19. Divesh – Lord of light / day
20. Dhiren – Strong, brave, firm-minded

More specifically Jain-oriented names:

1. Dharmsen – Army of dharma
2. Devkumar – Noble / divine prince
3. Dhairyash – One who has patience and courage (from “dhairya”)
4. Dharmik – Religious, righteous person
5. Dharmansh – Part of dharma

If you tell me your preference (short name / modern / very traditional / directly from scriptures), I can refine this list further and add more options with good combinations (first name + middle name) as per Jain tradition.