In the entire world, Riwen (日文 
, Riwen 
) is quite a rare principally male, but scarcely feminine first name. The forename Riwen is habitual in China, where it is a rare principally male, but scarcely feminine name, Indonesia, where it is a very rare unisex name, and Philippines, where it is an extremely rare boy's name. Very seldom, Riwen is the last name as well as the forename.