Do Jains use soni surname

Yes. Soni (often written Soni or Sonī) is a common Jain surname, especially among Jains in Gujarat, Rajasthan, and nearby regions. It traditionally indicates a family linked to the goldsmith/trading background, but many Jains with this surname are lay followers rather than a separate religious group. Surname usage varies by region and lineage, and both Digambar and Shwetambar communities include people with the Soni surname.