Here are some simple and beautiful girl names starting with D (mostly Indian / Jain-friendly in tone and meaning):

1. Daya – compassion, kindness
2. Diksha – initiation into a spiritual path
3. Dipika / Deepika – lamp, light
4. Disha – direction, path
5. Dhara – earth, flow
6. Dhriti – patience, courage, steadiness
7. Drishti – vision, divine sight
8. Devanshi – part of the divine
9. Diya – lamp, light
10. Dhanyaa / Dhanya – blessed, fortunate
11. Darshita – one who is shown/manifested, visible, wise
12. Damini – lightning
13. Darshi / Darshiika – seer, one who has vision
14. Dharini – one who holds/supports (earth)
15. Dravya – substance (a Jain philosophical term, also used as a name)
16. Darshana – auspicious sight, दर्शन
17. Dharmika – righteous, follower of dharma
18. Devika – little goddess
19. Dharini / Dharna – firmness, support
20. Deekshita / Deeksha – the initiated one, dedicated

If you tell me:

• language preference (pure Sanskrit / more modern Indian), and
• if you want specifically Jain-scripture-based names (like names of Jain goddesses, aryikas, etc.),

I can give a shorter, very focused list to match that.