Here are Jain-friendly baby boy names starting with the letter D (with simple meanings):

Short & modern-sounding

1. Darsh – vision, divine sight
2. Dev – godly, divine
3. Diksh – initiation into religion
4. Druv / Dhruv – firm, steadfast, pole star
5. Dharv – one who sustains (from Dharma)
6. Dhanv – prosperous, wealthy (in virtues or money)
7. Dhir – patient, calm
8. Divesh – lord of light, radiant
9. Diyan – lamp, light, brilliance
10. Divit – immortal, eternal

Names related to Dharma / virtues

1. Dharm – religion, righteousness
2. Dharmaj – born of dharma
3. Dharmik – righteous, religious-minded
4. Dharmin – follower of dharma
5. Dharan – upholder, supporter
6. Dhaval – pure, white, spotless
7. Dayasagar – ocean of compassion
8. Dayanand – joy of compassion
9. Dayaal – merciful, kind
10. Dipt – shining, illuminated (spiritually)

Connected to Tirthankars / Jain context

1. Devendra – lord of devas (often used in Jain texts)
2. Deendayal – compassionate to the poor and weak
3. Dhanesh – lord of wealth (material or spiritual)
4. Digvijay – conqueror of directions (victory over inner enemies)
5. Devansh – part of the divine, portion of Godly qualities
6. Divyansh – part of divine light / brilliance

Traditional Sanskrit-type names

1. Dinesh – lord of the day, the sun
2. Dipak / Deepak – lamp, light
3. Dipanshu – ray of light
4. Dilip – a king from ancient stories, protector
5. Devesh – lord of the gods
6. Daman – self-controlled, one who restrains (senses)
7. Darpan – mirror (for self-reflection)
8. Devan – divine, godly person
9. Darshan – holy vision, to see the pure one
10. Devvrat / Devvrata – devoted to the divine vow

Very gentle, virtue-oriented names

1. Dayit – beloved, dear
2. Dheeraj – patience, endurance
3. Dhyan / Dhyaan – meditation, contemplation
4. Dhyey – goal, spiritual aim
5. Deshbhakt – devoted to one’s land and people
6. Divyaansh / Divyansh – part of divine radiance
7. Darpit – dedicated, offered (to dharma)
8. Darshit – shown, revealed (truth)
9. Debjit / Devjit – victorious by divine qualities

You can choose based on:

• Meaning you like (e.g., light, compassion, patience).
• Simplicity for daily use (Darsh, Dev, Dhruv, Dhyan, Dipt, Dhir).

If you tell me if you prefer very short (4–5 letters) or more traditional, I can narrow this to a top 10.