Last name Siewdass (Siewdass 
) , worldwide, is a rare family name. The last name Siewdass is habitual in Trinidad and Tobago, where it is quite a rare surname, Canada, where it is a very rare surname, and Venezuela. Measured by absolute frequency, it is the most numerous in Trinidad and Tobago, Canada, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Siewdass | Canada, United States, Trinidad and Tobago, Venezuela, India |