Common Jain surnames across different parts of India include:

• Jain
• Shah
• Mehta
• Bhandari
• Kumar
• Seth / Sheth
• Kapadia
• Lunia
• Oswal
• Porwal
• Agrawal / Agarwal
• Kothari
• Patni
• Jaini
• Golecha
• Dugar
• Mandot
• Sanklecha
• Nahar
• Kankaria
• Doshi
• Lodha
• Toshniwal
• Soni
• Vora
• Vaidya
• Mutha
• Bafna
• Suresh is sometimes used as a first name, not typically a Jain surname

Jain surnames often vary by:

• Region: Rajasthan, Gujarat, Madhya Pradesh, Maharashtra, Karnataka, Uttar Pradesh, and others
• Sampradaya / community background: Digambar or Shwetambar
• Family tradition: many Jain families use Jain as the surname, while others keep older business or clan-based surnames

If you want, I can also give you:

• state-wise Jain surnames
• Digambar Jain surnames
• Shwetambar Jain surnames