Answer

Here are some Jain-friendly male boy names starting with “Ru” that can also fit well in a Tamil-speaking family:

• Rushabh / Rishabh – Name of the 1st Tirthankar, Bhagwan Rishabhdev.
• Rushabhdev – Another devotional form connected with Bhagwan Rishabhdev.
• Rupesh – “Lord of beauty” or “beautiful form”; a culturally common Indian name.
• Ruchir – Beautiful, pleasant, radiant.
• Rujul – Simple, honest, straightforward; a value-aligned Jain name.
• Rudra – Common Indian name, but it is more associated with Hindu tradition than specifically Jain tradition.
• Ruhan – Spiritual, soulful; modern name, not specifically Jain scriptural.

Best Jain Choice

Rushabh or Rishabh is the most strongly Jain name because it is directly connected with Bhagwan Rishabhdev, the 1st Tirthankar.

Tamil-Friendly Note

In Tamil pronunciation, Rushabh may be written or pronounced close to:

• Rushab
• Rishab
• Rishabh

Takeaway

If you want a name that is clearly Jain, meaningful, and suitable for a boy, Rushabh / Rishabh is the best option starting with “Ru.”