Here are some simple Jain names starting with “T”. (If you had something specific in mind – like baby names, Tirthankar names, boys/girls only – you can ignore the others.)

Unisex / General spiritual names

• Tirthankar – One who has attained keval jnān and shows the path of liberation.
• Tejas / Tejasi – Radiance, spiritual brilliance.
• Tapas / Tapasvi – One who practices penance (tapas).
• Tyagi / Tyagini – One who renounces.

Boys’ names (commonly used among Jains)

• Tarun – Young, ever-fresh.
• Tejas – Bright, full of energy and brilliance.
• Tejendra – Lord of brilliance.
• Tirth – Holy ford/crossing place (as in tīrth).
• Tirthesh – Lord of a holy place.
• Tushar – Snow, coolness, calm nature.
• Trilok – Three worlds (heaven, earth, hell).
• Trilokesh – Lord of the three worlds (used respectfully for Arihant/Paramatma).

Girls’ names (commonly used among Jains)

• Tarika – Star.
• Tara – Star, saviouress.
• Tanvi – Delicate, gentle.
• Trisha – Desire (often turned towards spiritual longing).
• Tripti – Contentment, satisfaction.
• Triveni – Holy confluence (used symbolically).
• Toshita / Tushita – One who is content, satisfied.

If you tell me:

• boy or girl,
• and if you want specifically “more spiritual / Jain-history based” names,

I can give you a more focused list with meanings.