Family name Harnain (Harnain 
) , globally, is a very rare cognomen. The surname Harnain is habitual in Malaysia, where it is a rare surname, Philippines, where it is a very rare surname, and the United States, where it is an extremely rare surname. Measured by absolute frequency, this name is the most popular in Malaysia, Philippines, and India. Also, Harnain is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Harnain | United States, India, Malaysia, Philippines |