Surname Kunarathnam (Kunarathnam 
) , worldwide, is a very rare last name. The cognomen Kunarathnam is habitual in Malaysia, where it is a very rare surname, Canada, and the United States, where it is an extremely rare surname. Likewise, Kunarathnam is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kunarathnam | Canada, United States, Malaysia |