Globally, Nithu (Nithu 
) is quite a rare epicene forename. The first name Nithu is habitual in Qatar, where it is quite a rare masculine name, Kuwait, where it is a rare feminine name, and India, where it is a rare gender-neutral name. Measured by absolute frequency, this name is the most popular in India, Qatar, and Saudi Arabia. Very seldom, Nithu is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Nithu | Saudi Arabia, Sri Lanka, India, Bangladesh, Qatar |