Here are some Jain-friendly names starting with R and T, with simple meanings:

Names starting with “R”

For boys

• Rishabh / Rishabha – Name of the 1st Tirthankar, Bhagwan Rishabhdev
• Rishabhkumar – Devoted to Rishabhdev
• Ratnakar – Mine of jewels (symbol of virtues)
• Ratnadev – Divine like a jewel
• Ratnendra – Lord of jewels (good qualities)
• Ravindra – Lord of the sun, bright like the sun
• Rajendra – King among men, noble ruler
• Ravikumar – Son of the sun, radiant child
• Ramanik / Ramnik – Pleasant, charming
• Rajat – Silver, pure and bright

For girls

• Rajul – Simple, pure-hearted (famously wife of Lord Neminath in stories)
• Ratan / Ratna – Jewel, precious one
• Ratnashri / Ratnashree – Auspicious like a jewel
• Riddhi – Prosperity, spiritual success
• Richa – Hymn, praise
• Rekha – Line, limit, also used in scriptures for marking boundaries
• Roshni – Light, brightness
• Riddhika – One who brings prosperity and growth

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Names starting with “T”

For boys

• Tarun – Young, ever-fresh
• Tejas / Tejaskumar – Brightness, spiritual glow
• Teerth / Tirth – Holy place, especially a Jain pilgrimage place
• Teerthank / Tirthank – Related to Tirthankar
• Teerthankar / Tirthankar – One who shows the path to liberation (name in honor of Tirthankars)
• Tarak / Tarak Kumar – One who helps to cross (worldly ocean), liberator
• Trilok – Three worlds (heaven, earth, hell)
• Trilokesh – Lord of the three worlds

For girls

• Trisha – Noble wish (for good, for dharma)
• Tejal / Tejala – Bright, radiant girl
• Tejaswini – Full of light and spiritual brilliance
• Tanvi – Delicate, gentle
• Taru / Taruni – Young girl, tender one
• Triloki / Trilokini – Related to the three worlds

If you say whether you need boy names or girl names only, and preferably Hindi / Gujarati / English style, you can directly pick from the suitable list above.