Around the globe, ریو (Riyo 
, Rijo 
, ریو) is a common epicene given name. The forename ریو is habitual in Japan, where it is quite a rare feminine name, United Arab Emirates, where it is quite a rare boy's name, and Qatar. Not in comparison with a country's population, this name is the most popular in Japan, Indonesia, and India. Also, ریو is the last name as well as the forename.