Here are some simple, Jain-friendly girl names starting with the letter T, with short meanings:

1. Tanvi – delicate, gentle, graceful
2. Tara – star; light and guidance
3. Trisha – wish, aspiration (can be taken as good spiritual desire)
4. Titiksha – tolerance, patience in difficulties (linked to tapas and forbearance)
5. Trupti – contentment, inner satisfaction
6. Toshi / Toshiika – one who is pleasing, brings joy
7. Triveni – confluence of three; can be seen as three jewels (samyak darshan, jnān, chāritra)
8. Twisha / Tvesha – bright, full of energy
9. Tarini – one who helps across, saviouress (spiritually uplifting)
10. Tejasvi / Teja – full of spiritual radiance, brilliance

If you tell me your preference (very short name, very unique, based on Jain virtues like ahimsa or tapas, or linked to Tirthankars), I can suggest a more focused list.