Surname Sanmuganathan (Sanmuganathan 
) , in the world, is a rare last name. The family name Sanmuganathan is characteristic of Sri Lanka, where it is quite a rare surname, Malaysia, where it is a rare surname, and Singapore. Not in comparison with a country's population, this name is the most popular in Sri Lanka, Malaysia, and Canada. Also, Sanmuganathan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sanmuganathan | Canada, United Kingdom, India, Sri Lanka, Malaysia |