Last name Nallainathan (Nallainathan 
) , globally, is a very rare cognomen. The cognomen Nallainathan is habitual in Australia, where it is a rare surname, Canada, where it is a very rare surname, and the United Kingdom, where it is an extremely rare surname. Measured by absolute frequency, this name is the most popular in Australia, the United States, and Canada. Much less frequently, Nallainathan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Nallainathan | Australia, United States, United Kingdom, Canada |