Oswal is itself a Jain surname, used by members of the Oswal (or Oswal Jain) community. This community is traditionally associated with Rajasthan and nearby regions (historically linked to the town of Osian), but today Oswal families are spread widely.

Important points:

• Oswal is the primary surname of this Jain group.
• Within the Oswal community, there are many different family lineages and gotras; there isn’t a single fixed list of “Oswal surnames.”
• Surnames among Oswal families can vary by region and lineage, so you’ll see a variety of family names depending on birthplace and ancestral gotra.

If you’d like, I can look up more specific, region-based examples of surnames historically associated with Oswal families.