Here are some good Jain-friendly boy names starting with “Di”:

1. Digambar – One of the two main Jain sects; means “clothed with the directions (sky‑clad)”.
2. Digvijay – One who conquers the directions / victorious in all directions.
3. Dinesh – Lord of the day; the sun.
4. Divyesh – Divine lord; one who is full of light.
5. Divit – Immortal; one who is blessed.
6. Dikshant – Completion of “diksha” (vows/initiations); related to religious vows.
7. Dilip – A righteous, charitable king mentioned in ancient texts.
8. Devansh – Part/portion of God; divine part.
9. Dhruv – Firm, steadfast; name of the devout boy whose austerity made him a fixed star (Dhruv Tara) – often appreciated in Jain stories too.
10. Dinesh Kumar – Combining “Dinesh” (sun) with a respectful suffix “Kumar”.

If you want, I can suggest only very rare names from “Di” or only those directly appearing in Jain texts / tradition.