Here are some beautiful Jain-friendly girl names related to the letter D, with simple meanings:

1. Darshika – One who sees/has vision (spiritual vision)
2. Dipika / Deepika – Small lamp, light of knowledge
3. Dhara – Earth; also flow, support
4. Disha – Direction, path (can be seen as right path in life)
5. Divya – Divine, pure, full of light
6. Devanshi – Part of the divine, god‑like soul
7. Diksha – Initiation into a spiritual path
8. Drashti / Drishti – Vision, right view (samyak-darshan feeling)
9. Dishaali / Dishali – One who shows direction
10. Dharini – One who holds or sustains; patient and strong
11. Dhruvi – Firm, steady like Dhruv (symbol of steadiness in faith)
12. Daya / Dayalata – Compassion, kindness (very important Jain quality)
13. Dharmaja / Dharmika – Religious, devoted to dharma
14. Devika – Little devi; pure and auspicious
15. Darshini – One who is blessed with right seeing or intuitive vision

If you share your preference (short/long name, very traditional or modern-sounding, language like Hindi/Gujarati), I can narrow this down to a few best options.