Across the world, Sainu (Sainu 
) is quite a rare epicene first name. The first name Sainu is characteristic of Western Asia, particularly United Arab Emirates, where it is quite a rare masculine name, Qatar, and Saudi Arabia, where it is quite a rare predominantly masculine, but very seldom female name. In absolute terms, it is the most numerous in India, Saudi Arabia, and United Arab Emirates. Also, Sainu is the last name as well as the forename.