* Limited Data: Detailed genealogical records for specific caste groups within Bengal are not always widely available.
* Variations: Surnames can evolve over time. "Sur" might be a variant spelling or a nickname that became a surname, making it difficult to trace its origins precisely.
* Caste Fluidity: Caste identities in Bengal (and India in general) can be complex and fluid. There might be historical intermingling between communities, making it possible for surnames to be shared across groups.
To find out more, you'd need to:
* Consult specific genealogical resources: Look for family trees, historical records, or genealogical databases specific to Bengali Rajput communities.
* Connect with genealogists: Genealogists with expertise in Bengal or Rajput communities might have insights.
* Reach out to community members: Contact individuals within Bengali Rajput communities. They may have knowledge of historical surnames within their lineage.
Keep in mind that even with research, finding a definitive answer might be challenging due to the limitations mentioned above.